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Which is better, Galaxy S21 5G 256GB or Galaxy S20 5G UW 128GB? We compared their features and specs in detail

Created date: 2021-01-13 21:57:14

Galaxy S21 5G 256GBGalaxy S20 5G UW 128GB
Galaxy S21 5G 256GBGalaxy S20 5G UW 128GB

Are you having trouble comparing the differences in features and performance of the "Galaxy S21 5G 256GB" and "Galaxy S20 5G UW 128GB", or unsure about their differences in ease-of-use, and wondering which to buy? We did a deep-dive comparison of the features, specs, and capabilities of these two smartphone, and provided our rating of which one was a better buy.

Galaxy S21 5G 256GBGalaxy S20 5G UW 128GB
Galaxy S21 5G 256GB

Galaxy S20 5G UW 128GB

General rating:
Holding comfortrating-image3.5
69/100
rating-image3.7
73/100
Weightrating-image3.1
62/100
rating-image3.2
63/100
Screen sizerating-image4.5
90/100
rating-image4.5
90/100
Display qualityrating-image4.3
85/100
rating-image4.5
89/100
Battery liferating-image
- /100
rating-image4.0
80/100
Processing powerrating-image4.9
97/100
rating-image4.8
96/100
Memory capacityrating-image4.7
93/100
rating-image4.7
93/100
Storage capacityrating-image4.6
91/100
rating-image4.5
90/100
Rear camera performancerating-image5.0
100/100
rating-image5.0
100/100
Front camera performancerating-image3.2
64/100
rating-image3.2
64/100

"Galaxy S21 5G 256GB" and "Galaxy S20 5G UW 128GB", performance comparison

"Galaxy S21 5G 256GB" and "Galaxy S20 5G UW 128GB" 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 "Galaxy S21 5G 256GB" has a width of 71.2mm, a length of 151.7mm, and a thickness of 7.9mm. Also, the "Galaxy S20 5G UW 128GB" has a width of 69.1mm, a length of 151.7mm, and a thickness of 8.1mm.

Comparing the width and thickness of the body, there isn't much difference between the "Galaxy S21 5G 256GB" and "Galaxy S20 5G UW 128GB" 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 "Galaxy S21 5G 256GB" and the "Galaxy S20 5G UW 128GB". 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 "Galaxy S21 5G 256GB" and the "Galaxy S20 5G UW 128GB". 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)
Galaxy S21 5G 256GB69/10071.2mm x 151.7mm x 7.9mm
Galaxy S20 5G UW 128GB73/10069.1mm x 151.7mm x 8.1mm

"Galaxy S21 5G 256GB" and "Galaxy S20 5G UW 128GB", 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 "Galaxy S21 5G 256GB" is about 169.0g, and the weight of the "Galaxy S20 5G UW 128GB" is about 168.1g. Comparing the weight of the two devices, there isn't much difference in weight between the "Galaxy S21 5G 256GB" and "Galaxy S20 5G UW 128GB". That's why the likelihood of fatigue in the fingers and wrists after extended use 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.

ScoreWeight
Galaxy S21 5G 256GB62/100169.0g
Galaxy S20 5G UW 128GB63/100168.1g

"Galaxy S21 5G 256GB" and "Galaxy S20 5G UW 128GB", 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 "Galaxy S21 5G 256GB" has a 6.2inch display. Also, the "Galaxy S20 5G UW 128GB" has a 6.2inch display. Comparing the screen size, there is a negligible difference in screen size between the "Galaxy S21 5G 256GB" and the "Galaxy S20 5G UW 128GB". 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
Galaxy S21 5G 256GB90/1006.2inch
Galaxy S20 5G UW 128GB90/1006.2inch

"Galaxy S21 5G 256GB" and "Galaxy S20 5G UW 128GB", 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 "Galaxy S21 5G 256GB" is 1080 x 2400, and pixel density is 424ppi. Also, the resolution on the "Galaxy S20 5G UW 128GB" is 1440 x 3200, and pixel density is 565ppi. Comparing the pixel count, the difference in pixel density between the "Galaxy S21 5G 256GB" and the "Galaxy S20 5G UW 128GB" 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
Galaxy S21 5G 256GB85/100424ppi
Galaxy S20 5G UW 128GB89/100565ppi

"Galaxy S21 5G 256GB" and "Galaxy S20 5G UW 128GB", 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.

ScoreBattery capacity
Galaxy S21 5G 256GB - /100
Galaxy S20 5G UW 128GB80/1004000.0mAh

"Galaxy S21 5G 256GB" and "Galaxy S20 5G UW 128GB", 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 "Galaxy S21 5G 256GB"'s CPU is a Exynos 2100, with performance measured at 2.9GHz+2.8GHz+2.2GHz×8(8.0-cores). Also, the "Galaxy S20 5G UW 128GB"'s CPU is a Qualcomm SM8250 Snapdragon 865 5G, with performance measured at 2.84GHz+2.42GHz+1.8GHz×8(8.0-cores). Comparing CPU performance, there is almost no difference in the specs of the "Galaxy S21 5G 256GB" and the "Galaxy S20 5G UW 128GB". 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
Galaxy S21 5G 256GB97/1002.9GHz+2.8GHz+2.2GHz×8(8.0-cores)
Galaxy S20 5G UW 128GB96/1002.84GHz+2.42GHz+1.8GHz×8(8.0-cores)

"Galaxy S21 5G 256GB" and "Galaxy S20 5G UW 128GB", 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 "Galaxy S21 5G 256GB" is 8.0GB and the weight of the "Galaxy S20 5G UW 128GB" is 8.0GB. Comparing the devices in terms of RAM, there is almost no difference in the amount of RAM of the "Galaxy S21 5G 256GB" and the "Galaxy S20 5G UW 128GB". 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
Galaxy S21 5G 256GB93/1008.0GB
Galaxy S20 5G UW 128GB93/1008.0GB

"Galaxy S21 5G 256GB" and "Galaxy S20 5G UW 128GB", 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 "Galaxy S21 5G 256GB" is 256.0GB. Also the "Galaxy S20 5G UW 128GB" is 128.0GB. Regarding storage capacity, there is a negligible difference in storage capacity between the "Galaxy S21 5G 256GB" and "Galaxy S20 5G UW 128GB". 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
Galaxy S21 5G 256GB91/100256.0GB
Galaxy S20 5G UW 128GB90/100128.0GB

"Galaxy S21 5G 256GB" and "Galaxy S20 5G UW 128GB" 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.

"Galaxy S21 5G 256GB" has a 64.0MP main camera. Also, "Galaxy S20 5G UW 128GB" has a 64.0MP main camera. Comparing rear camera performance, the "Galaxy S21 5G 256GB" and "Galaxy S20 5G UW 128GB" have approximately the same pixel count. As a result, they can both take pictures and shoot videos of roughly the same quality. Therefore, we recommend comparing the two based on other aspects of performance and functionality.

ScoreRear-camera resolution
Galaxy S21 5G 256GB100/10064.0MP
Galaxy S20 5G UW 128GB100/10064.0MP

"Galaxy S21 5G 256GB" and "Galaxy S20 5G UW 128GB", 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.

"Galaxy S21 5G 256GB" has an 10.0MP front camera and "Galaxy S20 5G UW 128GB" has an 10.0MP front camera. Comparing rear camera performance, the "Galaxy S21 5G 256GB" and "Galaxy S20 5G UW 128GB" have approximately the same pixel count. As a result, they can both take pictures and shoot videos of roughly the same quality. Therefore, we recommend comparing the two based on other aspects of performance and functionality.

ScoreFront-camera resolution
Galaxy S21 5G 256GB64/10010.0MP
Galaxy S20 5G UW 128GB64/10010.0MP

"Galaxy S21 5G 256GB" and "Galaxy S20 5G UW 128GB", performance comparison by specification sheet

Galaxy S21 5G 256GBGalaxy S20 5G UW 128GB
ImageGalaxy S21 5G 256GBGalaxy S20 5G UW 128GB
MakerSamsungSamsung
Release date2021-01-292020-06-04
ColorPhantom Gray/Phantom White/Phantom Violet/Phantom PinkCloud Pink/Cosmic Grey/Cloud White
OSAndroidAndroid
Dimensions (width x height x thickness)71.2mm x 151.7mm x 7.9mm69.1mm x 151.7mm x 8.1mm
Weight169.0g168.1g
Display size6.2inch6.2inch
Display typeDynamic AMOLED 2XDynamic AMOLED 2X
Screen resolution (width x height)1080 x 24001440 x 3200
Pixel density424ppi565ppi
ChipsetExynos 2100Qualcomm SM8250 Snapdragon 865 5G
CPU specs2.9GHz+2.8GHz+2.2GHz×8(8.0-cores)2.84GHz+2.42GHz+1.8GHz×8(8.0-cores)
RAM size8.0GB8.0GB
Storage size256.0GB128.0GB
Rear-camera resolution64.0MP64.0MP
Front-camera resolution10.0MP10.0MP

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