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Galaxy A51 5G 128GB vs Galaxy S20 Ultra 5G 512GB: Which is the best?

Created date: 2020-04-07 18:25:15, Updated date: 2021-10-20 15:06:32

Galaxy A51 5G 128GBGalaxy S20 Ultra 5G 512GB
Galaxy A51 5G 128GBGalaxy S20 Ultra 5G 512GB

Are you having trouble comparing the differences in features and performance of the "Galaxy A51 5G 128GB" and "Galaxy S20 Ultra 5G 512GB", 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 A51 5G 128GBGalaxy S20 Ultra 5G 512GB
Galaxy A51 5G 128GB

Galaxy S20 Ultra 5G 512GB

General rating:
Portabilityrating-image3.2
73.6mm x 158.9mm x 8.7mm
rating-image3.0
76.0mm x 166.9mm x 8.8mm
Weightrating-image2.8
187.0g
rating-image2.3
222.0g
Size of screenrating-image4.5
6.5inch
rating-image4.6
6.9inch
Screen clarityrating-image4.2
404ppi
rating-image4.4
508ppi
Battery durationrating-image4.1
4500.0mAh
rating-image4.2
5000.0mAh
Processing capabilityrating-image4.6
2.2GHz+1.8GHz×8(8.0-cores)
rating-image4.9
2.73GHz+2.6GHz+2.0GHz×8(8.0-cores)
Memory capacityrating-image4.7
8.0GB
rating-image5.0
16.0GB
Storage capacityrating-image4.5
128.0GB
rating-image4.8
512.0GB
Rear camera functionrating-image4.9
48.0MP
rating-image5.0
108.0MP
Front camera functionrating-image4.9
32.0MP
rating-image5.0
40.0MP

Compare Performance and Usability

Size comparison of "Galaxy A51 5G 128GB" and "Galaxy S20 Ultra 5G 512GB". Which one would you choose?

Your device's size has a huge influence on how easy it is to hold or to operate with one hand. The smaller your device's width, the easier it will be to hold, but you'll also need to take device thickness into account. And when the length and width are both smaller, you'll find that it's much easier for you to operate it one-handed, since your fingers will find it much easier to reach where you want them to. On the other hand, longer lengths and wider widths might lead to devices that are hard to carry in your pocket, bulky even when you keep them in your bag, and all around less portable.

The "Galaxy A51 5G 128GB" is 73.6mm wide, 158.9mm tall, and 8.7mm thick. The "Galaxy S20 Ultra 5G 512GB" is 76.0mm tall, 166.9mm wide, and 8.8mm thick.

There is no real difference between the "Galaxy A51 5G 128GB" and "Galaxy S20 Ultra 5G 512GB" when comparing their width, thickness, and slimness; they are both around the same in terms of one-handed ease of use and carry. Because of this, it is better to compare them based on other aspects of performance and function.

There is no real difference in length or width between the "Galaxy A51 5G 128GB" and "Galaxy S20 Ultra 5G 512GB", so they are both about the same in terms of usability, ease of carry, and bulkiness. Because of this, it is better to compare them based on other aspects of performance and function.

When comparing their sizes as a whole, there is no real difference between the "Galaxy A51 5G 128GB"and "Galaxy S20 Ultra 5G 512GB". Thus they are roughly the same in terms of ease of carry and one-handed use. Because of this, it is better to compare them based on other aspects of performance and function.

ScoreDimensions (width x height x thickness)
Galaxy A51 5G 128GB63/10073.6mm x 158.9mm x 8.7mm
Galaxy S20 Ultra 5G 512GB59/10076.0mm x 166.9mm x 8.8mm

Which one is easier to hold, "Galaxy A51 5G 128GB" or "Galaxy S20 Ultra 5G 512GB"? Compare weight

The device weight will effect how quickly you tire from holding it, and how much stress is put on your wrist. The lighter it is, the longer you can hold it without feeling tired. Also, less stress on your wrist will make using it easier and more pleasant. Unless the weight is right for you, it might put too much strain on your body and make using it more stressful.

The "Galaxy A51 5G 128GB" weighs 187.0g. The "Galaxy S20 Ultra 5G 512GB" clocks in at 222.0g. Comparing the weight of the main unit, the "Galaxy A51 5G 128GB" is a lighter phone than the "Galaxy S20 Ultra 5G 512GB", with a difference of approximately 35g. Therefore, there is less strain on your fingers and wrists even when you use your phone for a long time on the "Galaxy A51 5G 128GB" compared to the "Galaxy S20 Ultra 5G 512GB". For this reason, the "Galaxy A51 5G 128GB" is recommended.

ScoreWeight
Galaxy A51 5G 128GB55/100187.0g
Galaxy S20 Ultra 5G 512GB46/100222.0g

Which is better in terms of display, "Galaxy A51 5G 128GB" or "Galaxy S20 Ultra 5G 512GB"?

Screen size influences how well you can control your device, as well as how clear the display is. With a large screen, the text and buttons in apps will display large enough so you'll be less likely to accidentally tap the button next to the one you were aiming for. Plus, you'll be able to enjoy more high-impact visuals for games and movies.

The screen size on the "Galaxy A51 5G 128GB" is 6.5inch, and 6.9inch on the "Galaxy S20 Ultra 5G 512GB". The screens of the "Galaxy A51 5G 128GB" and "Galaxy S20 Ultra 5G 512GB" are roughly the same size, and so the ease of pressing app buttons are the same on both devices. Because of this, it is better to compare them based on other aspects of performance and function.

ScoreDisplay size
Galaxy A51 5G 128GB90/1006.5inch
Galaxy S20 Ultra 5G 512GB91/1006.9inch

Which one has a better display, "Galaxy A51 5G 128GB" or "Galaxy S20 Ultra 5G 512GB"?

Pixel density influences how nice your device's screen looks, with high pixel densities making screens look more beautiful, and letting you get more out of your games and movies. Plus, the nicer you screen looks, the less strain you'll be putting on your eyes, so you'll tend to be able to use your device for longer before your eyes get tired.

The screen on the "Galaxy A51 5G 128GB" has a 1080 x 2400 resolution and a pixel density of 404ppi. The "Galaxy S20 Ultra 5G 512GB", on the other hand, has a screen resolution of 1440 x 3200 and a pixel density of 508ppi. There is not much of a difference in the pixel resolutions of the "Galaxy A51 5G 128GB" and "Galaxy S20 Ultra 5G 512GB", so they are about the same in terms of clarity of image and gentleness on the eyes. For this reason it is better to compare them based on other aspects of performance and function.

ScorePixel density
Galaxy A51 5G 128GB84/100404ppi
Galaxy S20 Ultra 5G 512GB87/100508ppi

How is the battery duration of "Galaxy A51 5G 128GB" different from that of "Galaxy S20 Ultra 5G 512GB" ? See the differences

Battery performance has a big effect on the battery life of your device. However, a high battery capacity doesn't necessarily mean a long battery life. Rather, the rate of power consumption needs to be taken into consideration as well. The larger the screen and the higher the CPU performance, the higher the rate of power consumption on your battery.

The "Galaxy A51 5G 128GB" has a battery capacity of 4500.0mAh, while the "Galaxy S20 Ultra 5G 512GB" has a 5000.0mAh battery. The batteries of both the "Galaxy A51 5G 128GB" and "Galaxy S20 Ultra 5G 512GB" perform to the same extent. There is also no difference in the battery capacities of the "Galaxy A51 5G 128GB" and the "Galaxy S20 Ultra 5G 512GB". Since their battery life is practically identical, it would be better to compare them based on other aspects of performance and function.

ScoreBattery capacity
Galaxy A51 5G 128GB81/1004500.0mAh
Galaxy S20 Ultra 5G 512GB83/1005000.0mAh

Which is better in terms of CPU function, "Galaxy A51 5G 128GB" or "Galaxy S20 Ultra 5G 512GB"?

Your CPU's speed will influence the processing power of the applications you run, and together with the number of cores in the CPU, as well as its clock frequency, will determine the processing power available for apps. The higher these performance factors, the smoother your games and apps will run. Conversely, if these factors are too low, your apps and games will be sluggish and struggle to run.

The "Galaxy A51 5G 128GB" is equipped with a Exynos 980 processor, and its performance speed is 2.2GHz+1.8GHz×8(8.0-cores). The "Galaxy S20 Ultra 5G 512GB" uses an Exynos 990 CPU that performs at a speed of 2.73GHz+2.6GHz+2.0GHz×8(8.0-cores). Comparing their CPU performance, the "Galaxy S20 Ultra 5G 512GB" has higher specs than the "Galaxy A51 5G 128GB". For this reason, applications run better on the "Galaxy S20 Ultra 5G 512GB" compared to the "Galaxy A51 5G 128GB", and games run very smoothly. Therefore, the "Galaxy S20 Ultra 5G 512GB" is recommended.

ScoreCPU specs
Galaxy A51 5G 128GB92/1002.2GHz+1.8GHz×8(8.0-cores)
Galaxy S20 Ultra 5G 512GB98/1002.73GHz+2.6GHz+2.0GHz×8(8.0-cores)

How is "Galaxy A51 5G 128GB" different from "Galaxy S20 Ultra 5G 512GB" in terms of memory capacity?

Your device's multimedia performance and app stability are both influenced by the amount of memory it has available. The more memory, the more apps you can use simultaneously, while keeping everything stable and smooth. Plus, there'll be less chance of animations lagging or apps crashing. You also need to keep in mind that some games won't run at all if there's not enough memory available.

The "Galaxy A51 5G 128GB" has 8.0GB of memory. The "Galaxy S20 Ultra 5G 512GB", on the other hand, has 16.0GB. Comparing the memory performance, the "Galaxy S20 Ultra 5G 512GB" has a larger memory capacity than the "Galaxy A51 5G 128GB", with a difference of approximately 8GB. For this reason, multitasking is smoother on the "Galaxy S20 Ultra 5G 512GB" than the "Galaxy A51 5G 128GB", and applications are less likely to crash. Also, it is more enjoyable to play 3D games and VR on the "Galaxy S20 Ultra 5G 512GB". For this reason, the "Galaxy S20 Ultra 5G 512GB" is recommended.

ScoreRAM size
Galaxy A51 5G 128GB93/1008.0GB
Galaxy S20 Ultra 5G 512GB100/10016.0GB

Which has a better storage capacity, "Galaxy A51 5G 128GB" or "Galaxy S20 Ultra 5G 512GB"?

Storage capacity determines the amount of data you'll be able to save on your device. The more storage you have, the more photos you can take and the more apps you can install. Plus, if your smartphone is compatible with SD cards, then you can increase the amount of available storage. However, SD cards have a slower writespeed, making them less desirable in terms of performance, and users should be aware that it won't be possible to transfer all kinds of data to the card.

The "Galaxy A51 5G 128GB" has 128.0GB of storage, while the "Galaxy S20 Ultra 5G 512GB" has 512.0GB. There is no real difference between the "Galaxy A51 5G 128GB"and "Galaxy S20 Ultra 5G 512GB" 's ROMs and storage capacities, so both can store roughly the same amount of photographs and apps. Because of this, it is better to compare them based on other aspects of performance and function.

ScoreStorage size
Galaxy A51 5G 128GB90/100128.0GB
Galaxy S20 Ultra 5G 512GB95/100512.0GB

Compare the rear cameras of "Galaxy A51 5G 128GB" and "Galaxy S20 Ultra 5G 512GB". Which one has better picture quality?

One factor in how well your rear camera (the camera on the back of your device) performs is its megapixel count. With a higher megapixel count, you'll be able to take photos with sharper detail, photos that stay clear and sharp even when printed.

The main camera on the "Galaxy A51 5G 128GB" has 48.0MP. The "Galaxy S20 Ultra 5G 512GB" has 108.0MP. The rear facing cameras of the "Galaxy A51 5G 128GB" and "Galaxy S20 Ultra 5G 512GB" have roughly the same performance, so the quality of the photograph and video footage they can capture is around the same. Because of this, it is better to compare them based on other aspects of performance and function.

ScoreRear-camera resolution
Galaxy A51 5G 128GB97/10048.0MP
Galaxy S20 Ultra 5G 512GB100/100108.0MP

Which has a front camera with better picture quality, "Galaxy A51 5G 128GB" or "Galaxy S20 Ultra 5G 512GB"?

One indication of how well your forward facing camera (the camera on the same side as your device's screen) performs is how many megapixels it has. More megapixels means you'll be able to take photos with sharper detail, that still look amazing printed out.

The forward-facing camera on the "Galaxy A51 5G 128GB" has a resolution of 32.0MP. The "Galaxy S20 Ultra 5G 512GB"'s has 40.0MP. There is little difference between the camera capabilities and the pixel density of the "Galaxy A51 5G 128GB" and "Galaxy S20 Ultra 5G 512GB"'s front facing cameras, so the quality of photographs and video footage is virtually the same. Because of this, it is better to compare them based on other aspects of performance and function.

ScoreFront-camera resolution
Galaxy A51 5G 128GB97/10032.0MP
Galaxy S20 Ultra 5G 512GB100/10040.0MP

Compare Performance Specs

Galaxy A51 5G 128GBGalaxy S20 Ultra 5G 512GB
ImageGalaxy A51 5G 128GBGalaxy S20 Ultra 5G 512GB
MakerSamsungSamsung
Release date2020-04-082020-03-06
ColorPrism Cube Black/Prism Cube White/Prism Cube PinkCosmic Grey/Cosmic Black
OSAndroidAndroid
Dimensions (width x height x thickness)73.6mm x 158.9mm x 8.7mm76.0mm x 166.9mm x 8.8mm
Weight187.0g222.0g
Display size6.5inch6.9inch
Display typeSuper AMOLEDDynamic AMOLED 2X
Screen resolution (width x height)1080 x 24001440 x 3200
Pixel density404ppi508ppi
Battery capacity4500.0mAh5000.0mAh
ChipsetExynos 980Exynos 990
CPU specs2.2GHz+1.8GHz×8(8.0-cores)2.73GHz+2.6GHz+2.0GHz×8(8.0-cores)
RAM size8.0GB16.0GB
Storage size128.0GB512.0GB
Rear-camera resolution48.0MP108.0MP
Front-camera resolution32.0MP40.0MP

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