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Should you buy ROG Phone II ZS660KL 1024GB or vivo Y51 (2015) 16GB? Compare the differences in functions and specifications/performances thoroughly

Created date: 2019-09-07 05:45:22, Updated date: 2020-04-16 19:02:28

ROG Phone II ZS660KL 1024GBvivo Y51 (2015) 16GB
ROG Phone II ZS660KL 1024GBvivo Y51 (2015) 16GB

Are you having trouble comparing the differences in features and performance of the "ROG Phone II ZS660KL 1024GB" and "vivo Y51 (2015) 16GB", 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.

ROG Phone II ZS660KL 1024GBvivo Y51 (2015) 16GB
ROG Phone II ZS660KL 1024GB

vivo Y51 (2015) 16GB

General rating:

80.8/100

(The 5168th of all smartphones)

46/100

(The 1609th of all smartphones)

Holding comfort
55/100
69/100
Weight
44/100
67/100
Screen size
90/100
74/100
Display quality
82/100
36/100
Battery life
86/100
55/100
Processing power
98/100
33/100
Memory capacity
99/100
50/100
Storage capacity
99/100
50/100
Rear camera performance
97/100
50/100
Front camera performance
86/100
50/100

"ROG Phone II ZS660KL 1024GB" and "vivo Y51 (2015) 16GB", performance comparison

"ROG Phone II ZS660KL 1024GB" and "vivo Y51 (2015) 16GB" 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 "ROG Phone II ZS660KL 1024GB" has a width of 77.6mm, a length of 171.0mm, and a thickness of 9.5mm. Also, the "vivo Y51 (2015) 16GB" has a width of 71.7mm, a length of 143.8mm, and a thickness of 7.5mm.

Comparing the width and thickness of the body, the "vivo Y51 (2015) 16GB" is considerably smaller and more compact than the "ROG Phone II ZS660KL 1024GB". The "vivo Y51 (2015) 16GB" excels over the "ROG Phone II ZS660KL 1024GB" in terms of being easier to hold with one hand and is therefore less likely to be accidentally dropped. If you're looking for a smart phone with superior grip and hand fit, we recommend purchasing the "vivo Y51 (2015) 16GB" over the "ROG Phone II ZS660KL 1024GB".

Comparing the width and thickness of the body, the "vivo Y51 (2015) 16GB" is considerably smaller and more compact than the "ROG Phone II ZS660KL 1024GB". The "vivo Y51 (2015) 16GB" excels over the "ROG Phone II ZS660KL 1024GB" in terms of being easier to hold with one hand and is therefore less likely to be accidentally dropped. If you're looking for a smart phone with superior grip and hand fit, we recommend purchasing the "vivo Y51 (2015) 16GB" over the "ROG Phone II ZS660KL 1024GB".

Comparing the overall size of the two devices, the "vivo Y51 (2015) 16GB" is a considerably larger size than the "ROG Phone II ZS660KL 1024GB". In terms of being more convenient to use one-handed, and less likely to get in the way when you're not using it, the "vivo Y51 (2015) 16GB" is superior to the "ROG Phone II ZS660KL 1024GB". If you're going for the smart phone sized to be easiest to carry and handle with one hand, we recommend buying the "vivo Y51 (2015) 16GB" over the "ROG Phone II ZS660KL 1024GB".

ScoreDimensions (width x height x thickness)
ROG Phone II ZS660KL 1024GB55/10077.6mm x 171.0mm x 9.5mm
vivo Y51 (2015) 16GB69/10071.7mm x 143.8mm x 7.5mm

"ROG Phone II ZS660KL 1024GB" and "vivo Y51 (2015) 16GB", 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 "ROG Phone II ZS660KL 1024GB" is about 240.0g, and the weight of the "vivo Y51 (2015) 16GB" is about 157.0g. Comparing the weight of the two devices, the "vivo Y51 (2015) 16GB" is a considerably lighter smart phone than the "ROG Phone II ZS660KL 1024GB", and there is a difference of about 83g. In terms of the burden placed upon your fingers and wrist, the "vivo Y51 (2015) 16GB" is superior to the "ROG Phone II ZS660KL 1024GB". 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 Y51 (2015) 16GB" over the "ROG Phone II ZS660KL 1024GB".

ScoreWeight
ROG Phone II ZS660KL 1024GB44/100240.0g
vivo Y51 (2015) 16GB67/100157.0g

"ROG Phone II ZS660KL 1024GB" and "vivo Y51 (2015) 16GB", 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 "ROG Phone II ZS660KL 1024GB" has a 6.59inch display. Also, the "vivo Y51 (2015) 16GB" has a 5.0inch display. Comparing the screen size, the "ROG Phone II ZS660KL 1024GB" has a considerably larger screen than the "vivo Y51 (2015) 16GB", with a difference of approximately 1.58inch. The "ROG Phone II ZS660KL 1024GB" is superior to the "vivo Y51 (2015) 16GB" in terms of its larger buttons and the intensity of the user's experience when playing games and watching videos. In addition, the larger screen on the "ROG Phone II ZS660KL 1024GB" has the benefit of being easier on the user's eyes. If you are looking for a smartphone that you are less likely to mistap, offers a more intense viewing and gaming experience, and decreases eyestrain, then we recommend the "ROG Phone II ZS660KL 1024GB" over the "vivo Y51 (2015) 16GB".

ScoreDisplay size
ROG Phone II ZS660KL 1024GB90/1006.59inch
vivo Y51 (2015) 16GB74/1005.0inch

"ROG Phone II ZS660KL 1024GB" and "vivo Y51 (2015) 16GB", 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 "ROG Phone II ZS660KL 1024GB" is 1080 x 2340, and pixel density is 391ppi. Also, the resolution on the "vivo Y51 (2015) 16GB" is 540 x 960, and pixel density is 220ppi. Comparing the pixel count, the "ROG Phone II ZS660KL 1024GB" has much higher pixel density than the "vivo Y51 (2015) 16GB", with a difference of roughly 171ppi. In terms of having better picture quality and exerting less strain on the eyes, the "ROG Phone II ZS660KL 1024GB" is superior to the "vivo Y51 (2015) 16GB". If you are looking for a smartphone that is easy on the eyes, displaying texts and pictures clearly without any blurring, we recommend the "ROG Phone II ZS660KL 1024GB" over the "vivo Y51 (2015) 16GB".

ScorePixel density
ROG Phone II ZS660KL 1024GB82/100391ppi
vivo Y51 (2015) 16GB36/100220ppi

"ROG Phone II ZS660KL 1024GB" and "vivo Y51 (2015) 16GB", 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 "ROG Phone II ZS660KL 1024GB" is 6000.0mAh, and the "vivo Y51 (2015) 16GB" is 2350.0mAh. Regarding battery capacity, the "ROG Phone II ZS660KL 1024GB" has greater battery capacity than the "vivo Y51 (2015) 16GB", with a 3650mAh difference. Since the "ROG Phone II ZS660KL 1024GB" can be used for longer periods without recharging than the "vivo Y51 (2015) 16GB", it is great for outdoor use. If you want a smartphone with a longer battery life, we recommend the "ROG Phone II ZS660KL 1024GB" over the "vivo Y51 (2015) 16GB".

ScoreBattery capacity
ROG Phone II ZS660KL 1024GB86/1006000.0mAh
vivo Y51 (2015) 16GB55/1002350.0mAh

"ROG Phone II ZS660KL 1024GB" and "vivo Y51 (2015) 16GB", 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 "ROG Phone II ZS660KL 1024GB"'s CPU is a Qualcomm SM8150 Snapdragon 855+, with performance measured at 2.96GHz+2.42GHz+1.78GHz×8(8.0-cores). Also, the "vivo Y51 (2015) 16GB"'s CPU is a Qualcomm MSM8916 Snapdragon 410, with performance measured at 1.2GHz×4(4.0-cores). Comparing CPU performance, the "ROG Phone II ZS660KL 1024GB" has considerably higher specs than the "vivo Y51 (2015) 16GB". In terms of being able to comfortably play games and run apps smoothly, the "ROG Phone II ZS660KL 1024GB" is superior to the "vivo Y51 (2015) 16GB". If you're going for a high spec smart phone that runs smoothly and comfortably handles games, we recommend purchasing the "ROG Phone II ZS660KL 1024GB" over the "vivo Y51 (2015) 16GB".

ScoreCPU specs
ROG Phone II ZS660KL 1024GB98/1002.96GHz+2.42GHz+1.78GHz×8(8.0-cores)
vivo Y51 (2015) 16GB33/1001.2GHz×4(4.0-cores)

"ROG Phone II ZS660KL 1024GB" and "vivo Y51 (2015) 16GB", 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 "ROG Phone II ZS660KL 1024GB" is 12.0GB and the weight of the "vivo Y51 (2015) 16GB" is 2.0GB. Comparing the devices in terms of RAM, the "ROG Phone II ZS660KL 1024GB" has a significantly larger amount of RAM than the "vivo Y51 (2015) 16GB", with a difference of about 10GB. In terms of the unlikeliness of crashing and the ease of multitasking, 3D games and VR, the "ROG Phone II ZS660KL 1024GB" is superior to the "vivo Y51 (2015) 16GB". If you're looking for a smart phone that can run multiple apps simultaneously with stability and also allows you to comfortably enjoy 3D games and VR, then we recommend purchasing the "ROG Phone II ZS660KL 1024GB" over the "vivo Y51 (2015) 16GB".

ScoreRAM size
ROG Phone II ZS660KL 1024GB99/10012.0GB
vivo Y51 (2015) 16GB50/1002.0GB

"ROG Phone II ZS660KL 1024GB" and "vivo Y51 (2015) 16GB", 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 "ROG Phone II ZS660KL 1024GB" is 1024.0GB. Also the "vivo Y51 (2015) 16GB" is 16.0GB. Regarding storage capacity, the "ROG Phone II ZS660KL 1024GB" has a much larger data storage capacity compared to the "vivo Y51 (2015) 16GB", with a roughly 1008GB difference. In terms of the number of pictures you can save and the applications that you can install, the "ROG Phone II ZS660KL 1024GB" is superior to the "vivo Y51 (2015) 16GB". If you are looking for a smartphone that can save more data, we recommend the "ROG Phone II ZS660KL 1024GB" over the "vivo Y51 (2015) 16GB".

ScoreStorage size
ROG Phone II ZS660KL 1024GB99/1001024.0GB
vivo Y51 (2015) 16GB50/10016.0GB

"ROG Phone II ZS660KL 1024GB" and "vivo Y51 (2015) 16GB" 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.

"ROG Phone II ZS660KL 1024GB" has a 48.0MP main camera. Also, "vivo Y51 (2015) 16GB" has a 8.0MP main camera. Comparing rear camera performance, the "ROG Phone II ZS660KL 1024GB" has a much higher pixel count compared to the "vivo Y51 (2015) 16GB", with a roughly 40MP difference. In terms of taking or shooting high resolution pictures or videos that will look clean when printed, the "ROG Phone II ZS660KL 1024GB" is superior to the "vivo Y51 (2015) 16GB". If you are looking for a smartphone that is suited for shooting videos and taking pictures, we recommend the "ROG Phone II ZS660KL 1024GB" over the "vivo Y51 (2015) 16GB".

ScoreRear-camera resolution
ROG Phone II ZS660KL 1024GB97/10048.0MP
vivo Y51 (2015) 16GB50/1008.0MP

"ROG Phone II ZS660KL 1024GB" and "vivo Y51 (2015) 16GB", 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.

"ROG Phone II ZS660KL 1024GB" has an 24.0MP front camera and "vivo Y51 (2015) 16GB" has an 5.0MP front camera. Comparing rear camera performance, the front camera of the "ROG Phone II ZS660KL 1024GB" has a much higher pixel count compared to the "vivo Y51 (2015) 16GB", with a roughly 19MP difference. As a result, the "ROG Phone II ZS660KL 1024GB" is more suited than the "vivo Y51 (2015) 16GB" 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 "ROG Phone II ZS660KL 1024GB" over the "vivo Y51 (2015) 16GB".

ScoreFront-camera resolution
ROG Phone II ZS660KL 1024GB86/10024.0MP
vivo Y51 (2015) 16GB50/1005.0MP

"ROG Phone II ZS660KL 1024GB" and "vivo Y51 (2015) 16GB", performance comparison by specification sheet

ROG Phone II ZS660KL 1024GBvivo Y51 (2015) 16GB
ImageROG Phone II ZS660KL 1024GBvivo Y51 (2015) 16GB
MakerAsusvivo
Release date2019-092015-12
ColorMatte Black/Glossy BlackWhite
OSAndroidAndroid
Dimensions (width x height x thickness)77.6mm x 171.0mm x 9.5mm71.7mm x 143.8mm x 7.5mm
Weight240.0g157.0g
Display size6.59inch5.0inch
Display typeAMOLEDIPS LCD
Screen resolution (width x height)1080 x 2340540 x 960
Pixel density391ppi220ppi
Battery capacity6000.0mAh2350.0mAh
ChipsetQualcomm SM8150 Snapdragon 855+Qualcomm MSM8916 Snapdragon 410
CPU specs2.96GHz+2.42GHz+1.78GHz×8(8.0-cores)1.2GHz×4(4.0-cores)
RAM size12.0GB2.0GB
Storage size1024.0GB16.0GB
Rear-camera resolution48.0MP8.0MP
Front-camera resolution24.0MP5.0MP

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