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Galaxy S21 Ultra 5G 512GB vs OnePlus 8 5G (T-Mobile) 128GB: Full Comparison!

Created date: 2021-01-13 15:45:49

Galaxy S21 Ultra 5G 512GBOnePlus 8 5G (T-Mobile) 128GB
Galaxy S21 Ultra 5G 512GBOnePlus 8 5G (T-Mobile) 128GB

Here's our thorough comparison of the difference in performance and function between the "Galaxy S21 Ultra 5G 512GB" and "OnePlus 8 5G (T-Mobile) 128GB". Which one should you buy? We'll compare and explain what differs between the "Galaxy S21 Ultra 5G 512GB" and "OnePlus 8 5G (T-Mobile) 128GB" in a way that even people who aren't used to choosing between two similar products can understand.

Galaxy S21 Ultra 5G 512GBOnePlus 8 5G (T-Mobile) 128GB
Galaxy S21 Ultra 5G 512GB

OnePlus 8 5G (T-Mobile) 128GB

General rating:

75.2/100

(The - of all smartphones)

76.8/100

(The 3157th of all smartphones)

Holding comfort
59/100
66/100
Weight
46/100
58/100
Screen size
91/100
90/100
Display quality
88/100
84/100
Battery life
- /100
80/100
Processing power
99/100
96/100
Memory capacity
100/100
93/100
Storage capacity
95/100
90/100
Rear camera performance
100/100
97/100
Front camera performance
100/100
75/100

"Galaxy S21 Ultra 5G 512GB" and "OnePlus 8 5G (T-Mobile) 128GB", performance comparison

"Galaxy S21 Ultra 5G 512GB" and "OnePlus 8 5G (T-Mobile) 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 Ultra 5G 512GB" has a width of 75.6mm, a length of 165.1mm, and a thickness of 8.9mm. Also, the "OnePlus 8 5G (T-Mobile) 128GB" has a width of 72.9mm, a length of 160.2mm, and a thickness of 8.0mm.

Comparing the width and thickness of the body, the "OnePlus 8 5G (T-Mobile) 128GB" is smaller and more compact compared to the "Galaxy S21 Ultra 5G 512GB". For that reason, the "OnePlus 8 5G (T-Mobile) 128GB" is easier to grip firmly and carry one-handed than the "Galaxy S21 Ultra 5G 512GB". For that reason, we recommend the "OnePlus 8 5G (T-Mobile) 128GB".

Comparing the width and thickness of the body, there isn't a large difference in size between the "Galaxy S21 Ultra 5G 512GB" and the "OnePlus 8 5G (T-Mobile) 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 Ultra 5G 512GB" and the "OnePlus 8 5G (T-Mobile) 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 Ultra 5G 512GB59/10075.6mm x 165.1mm x 8.9mm
OnePlus 8 5G (T-Mobile) 128GB66/10072.9mm x 160.2mm x 8.0mm

"Galaxy S21 Ultra 5G 512GB" and "OnePlus 8 5G (T-Mobile) 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 Ultra 5G 512GB" is about 227.0g, and the weight of the "OnePlus 8 5G (T-Mobile) 128GB" is about 180.0g. Comparing the weight of the two devices, the "OnePlus 8 5G (T-Mobile) 128GB" is a considerably lighter smart phone than the "Galaxy S21 Ultra 5G 512GB", and there is a difference of about 47g. In terms of the burden placed upon your fingers and wrist, the "OnePlus 8 5G (T-Mobile) 128GB" is superior to the "Galaxy S21 Ultra 5G 512GB". 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 "OnePlus 8 5G (T-Mobile) 128GB" over the "Galaxy S21 Ultra 5G 512GB".

ScoreWeight
Galaxy S21 Ultra 5G 512GB46/100227.0g
OnePlus 8 5G (T-Mobile) 128GB58/100180.0g

"Galaxy S21 Ultra 5G 512GB" and "OnePlus 8 5G (T-Mobile) 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 Ultra 5G 512GB" has a 6.8inch display. Also, the "OnePlus 8 5G (T-Mobile) 128GB" has a 6.55inch display. Comparing the screen size, there is a negligible difference in screen size between the "Galaxy S21 Ultra 5G 512GB" and the "OnePlus 8 5G (T-Mobile) 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 Ultra 5G 512GB91/1006.8inch
OnePlus 8 5G (T-Mobile) 128GB90/1006.55inch

"Galaxy S21 Ultra 5G 512GB" and "OnePlus 8 5G (T-Mobile) 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 Ultra 5G 512GB" is 1440 x 3200, and pixel density is 516ppi. Also, the resolution on the "OnePlus 8 5G (T-Mobile) 128GB" is 1080 x 2400, and pixel density is 401ppi. Comparing the pixel count, the difference in pixel density between the "Galaxy S21 Ultra 5G 512GB" and the "OnePlus 8 5G (T-Mobile) 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 Ultra 5G 512GB88/100516ppi
OnePlus 8 5G (T-Mobile) 128GB84/100401ppi

"Galaxy S21 Ultra 5G 512GB" and "OnePlus 8 5G (T-Mobile) 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 Ultra 5G 512GB - /100
OnePlus 8 5G (T-Mobile) 128GB80/1004300.0mAh

"Galaxy S21 Ultra 5G 512GB" and "OnePlus 8 5G (T-Mobile) 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 Ultra 5G 512GB"'s CPU is a Exynos 2100, with performance measured at 2.9GHz+2.8GHz+2.2GHz×8(8.0-cores). Also, the "OnePlus 8 5G (T-Mobile) 128GB"'s CPU is a Qualcomm SM8250 Snapdragon 865, 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 Ultra 5G 512GB" and the "OnePlus 8 5G (T-Mobile) 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 Ultra 5G 512GB99/1002.9GHz+2.8GHz+2.2GHz×8(8.0-cores)
OnePlus 8 5G (T-Mobile) 128GB96/1002.84GHz+2.42GHz+1.8GHz×8(8.0-cores)

"Galaxy S21 Ultra 5G 512GB" and "OnePlus 8 5G (T-Mobile) 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 Ultra 5G 512GB" is 16.0GB and the weight of the "OnePlus 8 5G (T-Mobile) 128GB" is 8.0GB. Comparing the devices in terms of RAM, the "Galaxy S21 Ultra 5G 512GB" has more RAM than the "OnePlus 8 5G (T-Mobile) 128GB", with a difference of about 8GB. For that reason the "Galaxy S21 Ultra 5G 512GB" allows for smoother multitasking than the "OnePlus 8 5G (T-Mobile) 128GB", and apps are less likely to crash. In addition the "Galaxy S21 Ultra 5G 512GB" allows for smoother enjoyment of 3D games and VR. For this reason, we recommend the "Galaxy S21 Ultra 5G 512GB".

ScoreRAM size
Galaxy S21 Ultra 5G 512GB100/10016.0GB
OnePlus 8 5G (T-Mobile) 128GB93/1008.0GB

"Galaxy S21 Ultra 5G 512GB" and "OnePlus 8 5G (T-Mobile) 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 Ultra 5G 512GB" is 512.0GB. Also the "OnePlus 8 5G (T-Mobile) 128GB" is 128.0GB. Regarding storage capacity, there is a negligible difference in storage capacity between the "Galaxy S21 Ultra 5G 512GB" and "OnePlus 8 5G (T-Mobile) 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 Ultra 5G 512GB95/100512.0GB
OnePlus 8 5G (T-Mobile) 128GB90/100128.0GB

"Galaxy S21 Ultra 5G 512GB" and "OnePlus 8 5G (T-Mobile) 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 Ultra 5G 512GB" has a 108.0MP main camera. Also, "OnePlus 8 5G (T-Mobile) 128GB" has a 48.0MP main camera. Comparing rear camera performance, the "Galaxy S21 Ultra 5G 512GB" and "OnePlus 8 5G (T-Mobile) 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 Ultra 5G 512GB100/100108.0MP
OnePlus 8 5G (T-Mobile) 128GB97/10048.0MP

"Galaxy S21 Ultra 5G 512GB" and "OnePlus 8 5G (T-Mobile) 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 Ultra 5G 512GB" has an 40.0MP front camera and "OnePlus 8 5G (T-Mobile) 128GB" has an 16.0MP front camera. Comparing rear camera performance, the front camera of the "Galaxy S21 Ultra 5G 512GB" has a much higher pixel count compared to the "OnePlus 8 5G (T-Mobile) 128GB", with a roughly 24MP difference. As a result, the "Galaxy S21 Ultra 5G 512GB" is more suited than the "OnePlus 8 5G (T-Mobile) 128GB" 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 "Galaxy S21 Ultra 5G 512GB" over the "OnePlus 8 5G (T-Mobile) 128GB".

ScoreFront-camera resolution
Galaxy S21 Ultra 5G 512GB100/10040.0MP
OnePlus 8 5G (T-Mobile) 128GB75/10016.0MP

"Galaxy S21 Ultra 5G 512GB" and "OnePlus 8 5G (T-Mobile) 128GB", performance comparison by specification sheet

Galaxy S21 Ultra 5G 512GBOnePlus 8 5G (T-Mobile) 128GB
ImageGalaxy S21 Ultra 5G 512GBOnePlus 8 5G (T-Mobile) 128GB
MakerSamsungOnePlus
Release date2021-01-292020-04-29
ColorPhantom Black/Phantom Silver/Phantom Titanium/Phantom Navy/Phantom BrownOnyx Black/Interstellar Glow
OSAndroidAndroid
Dimensions (width x height x thickness)75.6mm x 165.1mm x 8.9mm72.9mm x 160.2mm x 8.0mm
Weight227.0g180.0g
Display size6.8inch6.55inch
Display typeDynamic AMOLED 2XFluid AMOLED
Screen resolution (width x height)1440 x 32001080 x 2400
Pixel density516ppi401ppi
ChipsetExynos 2100Qualcomm SM8250 Snapdragon 865
CPU specs2.9GHz+2.8GHz+2.2GHz×8(8.0-cores)2.84GHz+2.42GHz+1.8GHz×8(8.0-cores)
RAM size16.0GB8.0GB
Storage size512.0GB128.0GB
Rear-camera resolution108.0MP48.0MP
Front-camera resolution40.0MP16.0MP

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