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Which should you buy, the Oppo A55 (2021) 128GB or Oppo K7x (2020) 128GB? We offer a thorough comparison of the differences in functions, specifications and performance between the two

Created date: 2021-10-18 14:15:17

Oppo A55 (2021) 128GBOppo K7x (2020) 128GB
Oppo A55 (2021) 128GBOppo K7x (2020) 128GB

Are you having trouble comparing the differences in features and performance of the "Oppo A55 (2021) 128GB" and "Oppo K7x (2020) 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.

Oppo A55 (2021) 128GBOppo K7x (2020) 128GB
Oppo A55 (2021) 128GB

Oppo K7x (2020) 128GB

General rating:

67.7/100

(The 4693th of all smartphones)

78.6/100

(The 4174th of all smartphones)

Portability
60/100
60/100
Weight
53/100
52/100
Size of screen
90/100
90/100
Screen clarity
54/100
84/100
Battery duration
- /100
- /100
Processing capability
90/100
89/100
Memory capacity
90/100
90/100
Storage capacity
90/100
90/100
Rear camera function
98/100
97/100
Front camera function
75/100
75/100

Compare Performance and Usability

Size comparison of "Oppo A55 (2021) 128GB" and "Oppo K7x (2020) 128GB". 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 "Oppo A55 (2021) 128GB" is 75.7mm wide, 163.6mm tall, and 8.4mm thick. The "Oppo K7x (2020) 128GB" is 75.1mm tall, 162.2mm wide, and 9.1mm thick.

There is no real difference between the "Oppo A55 (2021) 128GB" and "Oppo K7x (2020) 128GB" 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 "Oppo A55 (2021) 128GB" and "Oppo K7x (2020) 128GB", 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 "Oppo A55 (2021) 128GB"and "Oppo K7x (2020) 128GB". 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)
Oppo A55 (2021) 128GB60/10075.7mm x 163.6mm x 8.4mm
Oppo K7x (2020) 128GB60/10075.1mm x 162.2mm x 9.1mm

Which one is easier to hold, "Oppo A55 (2021) 128GB" or "Oppo K7x (2020) 128GB"? 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 "Oppo A55 (2021) 128GB" weighs 193.0g. The "Oppo K7x (2020) 128GB" clocks in at 194.0g. The "Oppo A55 (2021) 128GB" and "Oppo K7x (2020) 128GB" have around the same weight, so prolonged use will tire out fingers nd wrists to around the same degree. Because of this, it is better to compare them based on other aspects of performance and function.

ScoreWeight
Oppo A55 (2021) 128GB53/100193.0g
Oppo K7x (2020) 128GB52/100194.0g

Which is better in terms of display, "Oppo A55 (2021) 128GB" or "Oppo K7x (2020) 128GB"?

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 "Oppo A55 (2021) 128GB" is 6.51inch, and 6.5inch on the "Oppo K7x (2020) 128GB". The screens of the "Oppo A55 (2021) 128GB" and "Oppo K7x (2020) 128GB" 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
Oppo A55 (2021) 128GB90/1006.51inch
Oppo K7x (2020) 128GB90/1006.5inch

Which one has a better display, "Oppo A55 (2021) 128GB" or "Oppo K7x (2020) 128GB"?

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 "Oppo A55 (2021) 128GB" has a 720 x 1600 resolution and a pixel density of 269ppi. The "Oppo K7x (2020) 128GB", on the other hand, has a screen resolution of 1080 x 2400 and a pixel density of 404ppi. Comparing the screen definition, the "Oppo K7x (2020) 128GB" has a much higher pixel density than the "Oppo A55 (2021) 128GB", with a difference of about 135ppi. The screen on the "Oppo K7x (2020) 128GB" is clear and crisp, and puts less strain on the eyes than that of the "Oppo A55 (2021) 128GB". If you want to choose a smartphone that is gentle on your eyes with a display that shows text and images clearly, we recommend that you buy the "Oppo K7x (2020) 128GB" rather than the "Oppo A55 (2021) 128GB".

ScorePixel density
Oppo A55 (2021) 128GB54/100269ppi
Oppo K7x (2020) 128GB84/100404ppi

How is the battery duration of "Oppo A55 (2021) 128GB" different from that of "Oppo K7x (2020) 128GB" ? 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.

ScoreBattery capacity
Oppo A55 (2021) 128GB - /100
Oppo K7x (2020) 128GB - /100

Which is better in terms of CPU function, "Oppo A55 (2021) 128GB" or "Oppo K7x (2020) 128GB"?

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 "Oppo A55 (2021) 128GB" is equipped with a MediaTek MT6765G Helio G35 processor, and its performance speed is 2.3GHz+1.8GHz×8(8.0-cores). The "Oppo K7x (2020) 128GB" uses an MediaTek MT6853V Dimensity 720 5G CPU that performs at a speed of 2.0GHz+2.0GHz×8(8.0-cores). There is also no real discrepancy between the CPU performances of the "Oppo A55 (2021) 128GB" and "Oppo K7x (2020) 128GB". Because of this, both phones will feel practically identical in terms of smoothness when running apps and ease of game play. This is why it is better to compare them based on other aspects of performance and function.

ScoreCPU specs
Oppo A55 (2021) 128GB90/1002.3GHz+1.8GHz×8(8.0-cores)
Oppo K7x (2020) 128GB89/1002.0GHz+2.0GHz×8(8.0-cores)

How is "Oppo A55 (2021) 128GB" different from "Oppo K7x (2020) 128GB" 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 "Oppo A55 (2021) 128GB" has 6.0GB of memory. The "Oppo K7x (2020) 128GB", on the other hand, has 6.0GB. Memory performance is roughly the same for both the "Oppo A55 (2021) 128GB" and "Oppo K7x (2020) 128GB"; as a result, multitasking, playing 3D games, and using VR feels the same on both devices. Because of this, it is better to compare them based on other aspects of performance and function.

ScoreRAM size
Oppo A55 (2021) 128GB90/1006.0GB
Oppo K7x (2020) 128GB90/1006.0GB

Which has a better storage capacity, "Oppo A55 (2021) 128GB" or "Oppo K7x (2020) 128GB"?

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 "Oppo A55 (2021) 128GB" has 128.0GB of storage, while the "Oppo K7x (2020) 128GB" has 128.0GB. There is no real difference between the "Oppo A55 (2021) 128GB"and "Oppo K7x (2020) 128GB" '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
Oppo A55 (2021) 128GB90/100128.0GB
Oppo K7x (2020) 128GB90/100128.0GB

Compare the rear cameras of "Oppo A55 (2021) 128GB" and "Oppo K7x (2020) 128GB". 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 "Oppo A55 (2021) 128GB" has 50.0MP. The "Oppo K7x (2020) 128GB" has 48.0MP. The rear facing cameras of the "Oppo A55 (2021) 128GB" and "Oppo K7x (2020) 128GB" 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
Oppo A55 (2021) 128GB98/10050.0MP
Oppo K7x (2020) 128GB97/10048.0MP

Which has a front camera with better picture quality, "Oppo A55 (2021) 128GB" or "Oppo K7x (2020) 128GB"?

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 "Oppo A55 (2021) 128GB" has a resolution of 16.0MP. The "Oppo K7x (2020) 128GB"'s has 16.0MP. There is little difference between the camera capabilities and the pixel density of the "Oppo A55 (2021) 128GB" and "Oppo K7x (2020) 128GB"'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
Oppo A55 (2021) 128GB75/10016.0MP
Oppo K7x (2020) 128GB75/10016.0MP

Compare Performance Specs

Oppo A55 (2021) 128GBOppo K7x (2020) 128GB
ImageOppo A55 (2021) 128GBOppo K7x (2020) 128GB
MakerOppoOppo
Release date2021-10-012020-11-11
ColorRainbow Blue/Starry Black/GreenBlue/Black
OSAndroidAndroid
Dimensions (width x height x thickness)75.7mm x 163.6mm x 8.4mm75.1mm x 162.2mm x 9.1mm
Weight193.0g194.0g
Display size6.51inch6.5inch
Display typeIPS LCDLTPS IPS LCD
Screen resolution (width x height)720 x 16001080 x 2400
Pixel density269ppi404ppi
ChipsetMediaTek MT6765G Helio G35MediaTek MT6853V Dimensity 720 5G
CPU specs2.3GHz+1.8GHz×8(8.0-cores)2.0GHz+2.0GHz×8(8.0-cores)
RAM size6.0GB6.0GB
Storage size128.0GB128.0GB
Rear-camera resolution50.0MP48.0MP
Front-camera resolution16.0MP16.0MP

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