Compare the differences in functions and specifications/performances of vivo S1 Pro (China) and vivo X21 thoroughly. Which one should you buy?

Created date: 11/18/2019, 09:47:54, Updated date: 11/18/2019, 12:08:27

vivo S1 Pro (China)vivo X21
vivo S1 Pro (China)vivo X21

Are you confused about which one to buy since you do not know the differences in functions and performances, as well as the ease of use of vivo S1 Pro (China) and vivo X21? We have compared the differences in functions and specifications/performances of these two smartphones and evaluated the one that you should buy.

vivo S1 Pro (China)vivo X21
vivo S1 Pro (China)

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vivo X21

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General rating:

81/100

(The 25th of all smartphones)

75.9/100

(The 241th of all smartphones)

Holding comfort
62/100
64/100
Weight
56/100
67/100
Screen size
90/100
90/100
Display quality
84/100
84/100
Battery life
75/100
68/100
Processing power
91/100
90/100
Memory capacity
93/100
90/100
Storage capacity
91/100
90/100
Rear camera performance
97/100
59/100
Front camera performance
97/100
70/100

Vivo S1 Pro (China) and vivo X21, performance comparison.

Vivo S1 Pro (China) and vivo X21 size comparison. Which to choose?

The size of the body has a big influence on the ease of carrying and one-handed operation. The narrower the width, the easier it is to firmly grasp and hold, but you also have to take into account the device's thickness. Also, if the width and height are smaller, its easier to operate one-handed since its easier to extend your fingers. On the contrary, if the width and height are large, it's difficult to fit in your pocket and is bulky even when put in a bag, and portability is impaired.

The vivo S1 Pro (China) has a width of 29.4 in (74.7 mm), a length of 61.9 in (157.3 mm), and a thickness of 3.2 in (8.2 mm).Also, the vivo X21 has a width of 29.4 in (74.8 mm), a length of 60.8 in (154.5 mm), and a thickness of 2.9 in (7.4 mm).

Comparing the width and thickness of the body, there isn't much difference between the vivo S1 Pro (China) and vivo X21 in terms of size. For that reason, the ease of gripping and carrying the devices in one hand is about the same for both. Therefore it's better to compare them in terms of performance and functionality.

Comparing the width and thickness of the body, there isn't a large difference in size between the vivo S1 Pro (China) and the vivo X21. For that reason their one-handed operability, portability, and bulkiness when carried is about the same. That's why I think it's better to compare them in terms of other aspects of performance and functionality.

Comparing the overall size of the two devices, there isn't a big difference in size between the vivo S1 Pro (China) and the vivo X21. For that reason the ease of carrying and use with one hand is about the same for both. That's why it is better to compare the two in terms of other aspects of performance and functionality.

ScoreDimensions (width x height x thickness)
vivo S1 Pro (China)62/10029.4 in (74.7 mm) x 61.9 in (157.3 mm) x 3.2 in (8.2 mm)
vivo X2164/10029.4 in (74.8 mm) x 60.8 in (154.5 mm) x 2.9 in (7.4 mm)

Vivo S1 Pro (China) and vivo X21, which is more comfortable to hold? Weight comparison

The weight of the device affects hand fatigue and the burden placed upon the wrist. The lighter it is, the longer you'll be able to operate the device without tiring. Also, if the burden placed on the wrist is lower, you'll be able to use the device more comfortably. However if the weight isn't right for you, it could place more of a burden on your body, causing you to feel stress.

The weight of the vivo S1 Pro (China) is about 6.5 oz (185 g), and the weight of the vivo X21 is about 5.5 oz (156.2 g).Comparing the weight of the two devices, the vivo X21 is a considerably lighter smart phone than the vivo S1 Pro (China), and there is a difference of about 1.0 oz (156.2 g). In terms of the burden placed upon your fingers and wrist, the vivo X21 is superior to the vivo S1 Pro (China). If you are going for a smart phone that won't lead to hand fatigue even after extended use, and is less likely to place a burden on your fingers, we recommend purchasing the vivo X21 over the vivo S1 Pro (China).

ScoreWeight
vivo S1 Pro (China)56/1006.5 oz (185 g)
vivo X2167/1005.5 oz (156.2 g)

Vivo S1 Pro (China) and vivo X21, whose display is easier to use?

The size of the screen affects usability and screen visibility. A larger screen means larger letters and buttons on apps, so the user is less likely to tap adjacent buttons by mistake. In addition, the user can enjoy a more intense experience when playing games and watching videos.

The vivo S1 Pro (China) has a 6.39 inch display. Also, the vivo X21 has a 6.28 inch display.Comparing the screen size, there is a negligible difference in screen size between the vivo S1 Pro (China) and the vivo X21. As a result, the app buttons on both are equally easy to press. We recommend comparing them based on other aspects of performance and functionality.

ScoreDisplay size
vivo S1 Pro (China)90/1006.39 inch
vivo X2190/1006.28 inch

Vivo S1 Pro (China) and vivo X21, which has a clearer display?

Pixel density affects picture quality, and the higher the pixel density, the better the picture quality, which means the user can gain more enjoyment from games and videos. In addition, higher picture quality decreases eyestrain, which means that the user will experience less eye fatigue after prolonged use.

The resolution on the vivo S1 Pro (China) is 1080 x 2340, and pixel density is 403ppi. Also, the resolution on the vivo X21 is 1080 x 2280, and pixel density is 401ppi.Comparing the pixel count, the difference in pixel density between the vivo S1 Pro (China) and the vivo X21 is negligible. As a result, they are both evenly matched in terms of picture quality and easiness on the eyes. Therefore, we recommend comparing them based on other aspects of performance and functionality.

ScorePixel density
vivo S1 Pro (China)84/100403ppi
vivo X2184/100401ppi

Vivo S1 Pro (China) and vivo X21, a summary of the differences in battery life.

Battery performance greatly affects battery life, but greater battery capacity does not necessarily mean greater battery life, since battery efficiency should also be considered. Bigger screens and higher CPU performance will mean the batteries are depleted more quickly.

The vivo S1 Pro (China) is 3700mAh, and the vivo X21 is 3200mAh.Regarding battery capacity, the vivo S1 Pro (China) has greater battery capacity than the vivo X21, with a 500.0mAh difference. If battery is a priority, then the vivo S1 Pro (China) is recommended over the vivo X21.

ScoreBattery capacity
vivo S1 Pro (China)75/1003700mAh
vivo X2168/1003200mAh

Vivo S1 Pro (China) and vivo X21, which has better CPU?

CPU performance affects the ability to process programs, and the ability to process programs is determined by the product of the number of cores in the CPU and the CPU frequency. The higher this performance is, the more smoothly apps and games will run, and with low performance apps and games become heavy and stress is experienced.

The vivo S1 Pro (China)'s CPU is a Qualcomm SDM675 Snapdragon 675, with performance measured at 2.0GHz+1.7GHz×8(OctaCore).Also, the vivo X21's CPU is a Qualcomm SDM660 Snapdragon 660, with performance measured at 2.2GHz+1.8GHz×8(OctaCore).Comparing CPU performance, there is almost no difference in the specs of the vivo S1 Pro (China) and the vivo X21. For that reason the level of smoothness felt when using apps and comfortable handling of games is about the same. For that reason it is better to compare them in terms of other aspects of performance and functionality.

ScoreCPU specs
vivo S1 Pro (China)91/1002.0GHz+1.7GHz×8(OctaCore)
vivo X2190/1002.2GHz+1.8GHz×8(OctaCore)

Vivo S1 Pro (China) and vivo X21, what's the difference in memory capacity?

RAM affects multitasking ability and the stability of apps. The larger the amount of RAM is, the more stability there will be even in situations where multiple apps are running simultaneously, allowing for comfortable use. In addition, animation will be more smooth, and apps will be less likely to freeze or crash. Also, without sufficient RAM, there are games you won't be able to run, so it is necessary to be careful.

The weight of the vivo S1 Pro (China) is 8GB and the weight of the vivo X21 is 6GB.Comparing the devices in terms of RAM, there is almost no difference in the amount of RAM of the vivo S1 Pro (China) and the vivo X21. For that reason they have about the same level of multitasking performance and 3D game and VR smoothness. That's why it is better to make a comparison in terms of other aspects of performance and functionality.

ScoreRAM size
vivo S1 Pro (China)93/1008GB
vivo X2190/1006GB

Vivo S1 Pro (China) and vivo X21, which has more data storage?

Storage capacity affects the amount of data that is capable of being stored. The larger the storage capacity, the more pictures you can take and the more applications you can install. In addition, if your smartphone accepts SD cards, then you can increase its storage capacity. However, there are performance related drawbacks, including a slower data transfer rate than the primary memory, and you cannot transfer all your data on the card, so be warned.

The data storage capacity of the vivo S1 Pro (China) is 256GB. Also the vivo X21 is 128GB.Regarding storage capacity, there is a negligible difference in storage capacity between the vivo S1 Pro (China) and vivo X21. As a result, you can save roughly the same amount of pictures, and install roughly the same amount of applications, on either phone. You are better off comparing them based on other aspects of performance and functionality.

ScoreStorage size
vivo S1 Pro (China)91/100256GB
vivo X2190/100128GB

Vivo S1 Pro (China) and vivo X21 rear camera performance comparison. Which has a higher resolution?

One factor that determines the performance of the exterior camera located on the back of the device (the rear/back camera) is the pixel count. The larger the pixel count, the higher the resolution of the pictures you can take, and the cleaner the pictures will look when printed.

Vivo S1 Pro (China) has a 48 MP main camera. Also, vivo X21 has a 12 MP main camera.Comparing rear camera performance, the vivo S1 Pro (China) has a much higher pixel count compared to the vivo X21, with a roughly 36.0 MP difference. In terms of taking or shooting high resolution pictures or videos that will look clean when printed, the vivo S1 Pro (China) is superior to the vivo X21. If you are looking for a smartphone that is suited for shooting videos and taking pictures, we recommend the vivo S1 Pro (China) over the vivo X21.

ScoreRear-camera resolution
vivo S1 Pro (China)97/10048 MP
vivo X2159/10012 MP

Vivo S1 Pro (China) and vivo X21, whose front camera has a better picture quality?

One factor that determines the performance of the exterior camera located on the front of the device (the in/front camera) is the pixel count. The larger the pixel count, the higher the resolution of the pictures you can take, and the cleaner the pictures will look when printed.

Vivo S1 Pro (China) has an 32 MP front camera and vivo X21 has an 12 MP front camera.Comparing rear camera performance, the front camera of the vivo S1 Pro (China) has a much higher pixel count compared to the vivo X21, with a roughly 20.0 MP difference. As a result, the vivo S1 Pro (China) is more suited than the vivo X21 for shooting videos and taking pictures. If you are looking for a smartphone that is suited for shooting high resolution selfies which will look clean when printed, we recommend the vivo S1 Pro (China) over the vivo X21.

ScoreFront-camera resolution
vivo S1 Pro (China)97/10032 MP
vivo X2170/10012 MP

Detailed comparison of vivo S1 Pro (China) and vivo X21.

Comparison for general rating.

ImageProduct nameReviewgeneral rating

vivo S1 Pro (China)

Score

81.0Display size:6.39 inch, Weight:6.5 oz (185 g), Chipset:Qualcomm SDM675 Snapdragon 675, CPU specs:2.0GHz+1.7GHz×8(OctaCore), RAM size:8GB, Storage size:256GB, Battery capacity:3700mAh

vivo X21

Score

75.9Display size:6.28 inch, Weight:5.5 oz (156.2 g), Chipset:Qualcomm SDM660 Snapdragon 660, CPU specs:2.2GHz+1.8GHz×8(OctaCore), RAM size:6GB, Storage size:128GB, Battery capacity:3200mAh

Comparison for body size.

ImageProduct nameReviewbody size

vivo S1 Pro (China)

Score

52.5Dimensions (width x height x thickness):29.4 in (74.7 mm) x 61.9 in (157.3 mm) x 3.2 in (8.2 mm)

vivo X21

Score

53.8Dimensions (width x height x thickness):29.4 in (74.8 mm) x 60.8 in (154.5 mm) x 2.9 in (7.4 mm)

Comparison for body weight.

ImageProduct nameReviewbody weight

vivo S1 Pro (China)

Score

56.4Weight:6.5 oz (185 g)

vivo X21

Score

67.9Weight:5.5 oz (156.2 g)

Comparison for screen size.

ImageProduct nameReviewscreen size

vivo S1 Pro (China)

Score

90.7Display size:6.39 inch

vivo X21

Score

90.5Display size:6.28 inch

Comparison for RAM capacity.

ImageProduct nameReviewRAM capacity

vivo S1 Pro (China)

Score

93.4RAM size:8GB

vivo X21

Score

90.0RAM size:6GB

Comparison for storage size.

ImageProduct nameReviewstorage size

vivo S1 Pro (China)

Score

91.5Storage size:256GB

vivo X21

Score

90.0Storage size:128GB

Comparison for battery.

ImageProduct nameReviewbattery

vivo S1 Pro (China)

Score

75.5Battery capacity:3700mAh

vivo X21

Score

68.0Battery capacity:3200mAh

Comparison for rear-camera resolution.

ImageProduct nameReviewrear-camera resolution

vivo S1 Pro (China)

Score

97.8Rear-camera resolution:48 MP

vivo X21

Score

59.3Rear-camera resolution:12 MP

Comparison for front-camera resolution.

ImageProduct nameReviewfront-camera resolution

vivo S1 Pro (China)

Score

97.8Front-camera resolution:32 MP

vivo X21

Score

70.0Front-camera resolution:12 MP

Comparison for grip.

ImageProduct nameReviewgrip

vivo S1 Pro (China)

Score

54.5Color:Blue,red,midsummer dream, Dimensions (width x height x thickness):29.4 in (74.7 mm) x 61.9 in (157.3 mm) x 3.2 in (8.2 mm), Weight:6.5 oz (185 g)

vivo X21

Score

60.8Color:Black,aurora white,ruby red, Dimensions (width x height x thickness):29.4 in (74.8 mm) x 60.8 in (154.5 mm) x 2.9 in (7.4 mm), Weight:5.5 oz (156.2 g)

Comparison for screen cleanliness.

ImageProduct nameReviewscreen cleanliness

vivo S1 Pro (China)

Score

84.9Display type:Super AMOLED, Screen resolution (width x height):1080 x 2340, Pixel density:403ppi

vivo X21

Score

84.9Display type:Super AMOLED, Screen resolution (width x height):1080 x 2280, Pixel density:401ppi

Comparison for performance.

ImageProduct nameReviewperformance

vivo S1 Pro (China)

Score

91.5OS:Android, Chipset:Qualcomm SDM675 Snapdragon 675, CPU specs:2.0GHz+1.7GHz×8(OctaCore), RAM size:8GB

vivo X21

Score

90.1OS:Android, Chipset:Qualcomm SDM660 Snapdragon 660, CPU specs:2.2GHz+1.8GHz×8(OctaCore), RAM size:6GB

Vivo S1 Pro (China) and vivo X21, performance comparison by specification sheet.

vivo S1 Pro (China)vivo X21
Imagevivo S1 Pro (China)vivo X21
Makervivovivo
Release date5, 20193, 2018
Colorblue,red,midsummer dreamblack,aurora white,ruby red
OSAndroidAndroid
Dimensions (width x height x thickness)29.4 in (74.7 mm) x 61.9 in (157.3 mm) x 3.2 in (8.2 mm)29.4 in (74.8 mm) x 60.8 in (154.5 mm) x 2.9 in (7.4 mm)
Weight6.5 oz (185 g)5.5 oz (156.2 g)
Display size6.39 inch6.28 inch
Display typeSuper AMOLEDSuper AMOLED
Screen resolution (width x height)1080 x 23401080 x 2280
Pixel density403ppi401ppi
Battery capacity3700mAh3200mAh
ChipsetQualcomm SDM675 Snapdragon 675Qualcomm SDM660 Snapdragon 660
CPU specs2.0GHz+1.7GHz×8(OctaCore)2.2GHz+1.8GHz×8(OctaCore)
RAM size8GB6GB
Storage size256GB128GB
Rear-camera resolution48 MP12 MP
Front-camera resolution32 MP12 MP

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