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Vivo S9 (2021) 256GB vs Xiaomi Redmi K20 256GB: Specs & Scores

Created date: 2021-03-02 15:22:28

vivo S9 (2021) 256GBXiaomi Redmi K20 256GB
vivo S9 (2021) 256GBXiaomi Redmi K20 256GB

Are you having trouble comparing the differences in features and performance of the "vivo S9 (2021) 256GB" and "Xiaomi Redmi K20 256GB", 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.

vivo S9 (2021) 256GBXiaomi Redmi K20 256GB
vivo S9 (2021) 256GB

Xiaomi Redmi K20 256GB

General rating:
Portabilityrating-image3.3
65/100
rating-image3.1
62/100
Weightrating-image3.1
61/100
rating-image2.7
54/100
Size of screenrating-image4.5
90/100
rating-image4.5
90/100
Screen clarityrating-image4.3
85/100
rating-image4.2
84/100
Battery durationrating-image
- /100
rating-image4.0
80/100
Processing capabilityrating-image4.8
96/100
rating-image4.6
92/100
Memory capacityrating-image5.0
99/100
rating-image4.7
93/100
Storage capacityrating-image4.6
91/100
rating-image4.6
91/100
Rear camera functionrating-image5.0
100/100
rating-image4.9
97/100
Front camera functionrating-image5.0
100/100
rating-image4.1
81/100

Compare Performance and Usability

Size comparison of "vivo S9 (2021) 256GB" and "Xiaomi Redmi K20 256GB". 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 "vivo S9 (2021) 256GB" is 73.9mm wide, 158.4mm tall, and 7.4mm thick. The "Xiaomi Redmi K20 256GB" is 74.3mm tall, 156.7mm wide, and 8.8mm thick.

There is no real difference between the "vivo S9 (2021) 256GB" and "Xiaomi Redmi K20 256GB" 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 "vivo S9 (2021) 256GB" and "Xiaomi Redmi K20 256GB", 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 "vivo S9 (2021) 256GB"and "Xiaomi Redmi K20 256GB". 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)
vivo S9 (2021) 256GB65/10073.9mm x 158.4mm x 7.4mm
Xiaomi Redmi K20 256GB62/10074.3mm x 156.7mm x 8.8mm

Which one is easier to hold, "vivo S9 (2021) 256GB" or "Xiaomi Redmi K20 256GB"? 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 "vivo S9 (2021) 256GB" weighs 173.0g. The "Xiaomi Redmi K20 256GB" clocks in at 191.0g. Comparing the weight of the main unit, the "vivo S9 (2021) 256GB" is a lighter phone than the "Xiaomi Redmi K20 256GB", with a difference of approximately 18g. Therefore, there is less strain on your fingers and wrists even when you use your phone for a long time on the "vivo S9 (2021) 256GB" compared to the "Xiaomi Redmi K20 256GB". For this reason, the "vivo S9 (2021) 256GB" is recommended.

ScoreWeight
vivo S9 (2021) 256GB61/100173.0g
Xiaomi Redmi K20 256GB54/100191.0g

Which is better in terms of display, "vivo S9 (2021) 256GB" or "Xiaomi Redmi K20 256GB"?

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 "vivo S9 (2021) 256GB" is 6.44inch, and 6.39inch on the "Xiaomi Redmi K20 256GB". The screens of the "vivo S9 (2021) 256GB" and "Xiaomi Redmi K20 256GB" 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
vivo S9 (2021) 256GB90/1006.44inch
Xiaomi Redmi K20 256GB90/1006.39inch

Which one has a better display, "vivo S9 (2021) 256GB" or "Xiaomi Redmi K20 256GB"?

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 "vivo S9 (2021) 256GB" has a 1080 x 2400 resolution and a pixel density of 408ppi. The "Xiaomi Redmi K20 256GB", on the other hand, has a screen resolution of 1080 x 2340 and a pixel density of 403ppi. There is not much of a difference in the pixel resolutions of the "vivo S9 (2021) 256GB" and "Xiaomi Redmi K20 256GB", 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
vivo S9 (2021) 256GB85/100408ppi
Xiaomi Redmi K20 256GB84/100403ppi

How is the battery duration of "vivo S9 (2021) 256GB" different from that of "Xiaomi Redmi K20 256GB" ? 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
vivo S9 (2021) 256GB - /100
Xiaomi Redmi K20 256GB80/1004000.0mAh

Which is better in terms of CPU function, "vivo S9 (2021) 256GB" or "Xiaomi Redmi K20 256GB"?

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 "vivo S9 (2021) 256GB" is equipped with a MediaTek MT6891Z Dimensity 1100 5G processor, and its performance speed is 2.6GHz+2.0GHz×8(8.0-cores). The "Xiaomi Redmi K20 256GB" uses an Qualcomm SDM730 Snapdragon 730 CPU that performs at a speed of 2.2GHz+1.8GHz×8(8.0-cores). There is also no real discrepancy between the CPU performances of the "vivo S9 (2021) 256GB" and "Xiaomi Redmi K20 256GB". 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
vivo S9 (2021) 256GB96/1002.6GHz+2.0GHz×8(8.0-cores)
Xiaomi Redmi K20 256GB92/1002.2GHz+1.8GHz×8(8.0-cores)

How is "vivo S9 (2021) 256GB" different from "Xiaomi Redmi K20 256GB" 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 "vivo S9 (2021) 256GB" has 12.0GB of memory. The "Xiaomi Redmi K20 256GB", on the other hand, has 8.0GB. Comparing the memory performance, the "vivo S9 (2021) 256GB" has a larger memory capacity than the "Xiaomi Redmi K20 256GB", with a difference of approximately 4GB. For this reason, multitasking is smoother on the "vivo S9 (2021) 256GB" than the "Xiaomi Redmi K20 256GB", and applications are less likely to crash. Also, it is more enjoyable to play 3D games and VR on the "vivo S9 (2021) 256GB". For this reason, the "vivo S9 (2021) 256GB" is recommended.

ScoreRAM size
vivo S9 (2021) 256GB99/10012.0GB
Xiaomi Redmi K20 256GB93/1008.0GB

Which has a better storage capacity, "vivo S9 (2021) 256GB" or "Xiaomi Redmi K20 256GB"?

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 "vivo S9 (2021) 256GB" has 256.0GB of storage, while the "Xiaomi Redmi K20 256GB" has 256.0GB. There is no real difference between the "vivo S9 (2021) 256GB"and "Xiaomi Redmi K20 256GB" '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
vivo S9 (2021) 256GB91/100256.0GB
Xiaomi Redmi K20 256GB91/100256.0GB

Compare the rear cameras of "vivo S9 (2021) 256GB" and "Xiaomi Redmi K20 256GB". 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 "vivo S9 (2021) 256GB" has 64.0MP. The "Xiaomi Redmi K20 256GB" has 48.0MP. The rear facing cameras of the "vivo S9 (2021) 256GB" and "Xiaomi Redmi K20 256GB" 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
vivo S9 (2021) 256GB100/10064.0MP
Xiaomi Redmi K20 256GB97/10048.0MP

Which has a front camera with better picture quality, "vivo S9 (2021) 256GB" or "Xiaomi Redmi K20 256GB"?

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 "vivo S9 (2021) 256GB" has a resolution of 44.0MP. The "Xiaomi Redmi K20 256GB"'s has 20.0MP. The front-facing camera of the "vivo S9 (2021) 256GB" has a significantly higher number of pixels than the "Xiaomi Redmi K20 256GB", with a difference of about 24MP. Therefore, the "vivo S9 (2021) 256GB" is more suitable for taking photos and videos than the "Xiaomi Redmi K20 256GB". If you want to take and print high-quality selfies, we recommend buying the "vivo S9 (2021) 256GB" rather than the "Xiaomi Redmi K20 256GB".

ScoreFront-camera resolution
vivo S9 (2021) 256GB100/10044.0MP
Xiaomi Redmi K20 256GB81/10020.0MP

Compare Performance Specs

vivo S9 (2021) 256GBXiaomi Redmi K20 256GB
Imagevivo S9 (2021) 256GBXiaomi Redmi K20 256GB
MakervivoXiaomi
Release date2021-03-032019-06
ColorBlack/White/Gradient BlueCarbon black/Red flame/Glacier blue/Pearl White
OSAndroidAndroid
Dimensions (width x height x thickness)73.9mm x 158.4mm x 7.4mm74.3mm x 156.7mm x 8.8mm
Weight173.0g191.0g
Display size6.44inch6.39inch
Display typeAMOLEDSuper AMOLED
Screen resolution (width x height)1080 x 24001080 x 2340
Pixel density408ppi403ppi
ChipsetMediaTek MT6891Z Dimensity 1100 5GQualcomm SDM730 Snapdragon 730
CPU specs2.6GHz+2.0GHz×8(8.0-cores)2.2GHz+1.8GHz×8(8.0-cores)
RAM size12.0GB8.0GB
Storage size256.0GB256.0GB
Rear-camera resolution64.0MP48.0MP
Front-camera resolution44.0MP20.0MP

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