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Should you buy Oppo K9 Pro (2021) 256GB or BLU G91 (2021) 128GB? Compare the differences in functions and specifications/performances thoroughly

Created date: 2021-09-26 21:02:19

Oppo K9 Pro (2021) 256GBBLU G91 (2021) 128GB
Oppo K9 Pro (2021) 256GBBLU G91 (2021) 128GB

Here's our thorough comparison of the difference in performance and function between the "Oppo K9 Pro (2021) 256GB" and "BLU G91 (2021) 128GB". Which one should you buy? We'll compare and explain what differs between the "Oppo K9 Pro (2021) 256GB" and "BLU G91 (2021) 128GB" in a way that even people who aren't used to choosing between two similar products can understand.

Oppo K9 Pro (2021) 256GBBLU G91 (2021) 128GB
Oppo K9 Pro (2021) 256GB

BLU G91 (2021) 128GB

General rating:

78.4/100

(The 4196th of all smartphones)

64.7/100

(The 4754th of all smartphones)

Portability
64/100
59/100
Weight
58/100
52/100
Size of screen
90/100
90/100
Screen clarity
85/100
54/100
Battery duration
- /100
- /100
Processing capability
99/100
88/100
Memory capacity
99/100
70/100
Storage capacity
91/100
90/100
Rear camera function
100/100
68/100
Front camera function
75/100
75/100

Compare Performance and Usability

Size comparison of "Oppo K9 Pro (2021) 256GB" and "BLU G91 (2021) 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 K9 Pro (2021) 256GB" is 73.5mm wide, 158.7mm tall, and 8.5mm thick. The "BLU G91 (2021) 128GB" is 76.0mm tall, 163.0mm wide, and 9.0mm thick.

Comparing the width and thickness of the main unit, the "Oppo K9 Pro (2021) 256GB" is smaller and more compact compared to the "BLU G91 (2021) 128GB". Therefore, it is easier to grip and hold the "Oppo K9 Pro (2021) 256GB" than the "BLU G91 (2021) 128GB". For this reason, the "Oppo K9 Pro (2021) 256GB" is recommended.

There is no real difference in length or width between the "Oppo K9 Pro (2021) 256GB" and "BLU G91 (2021) 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 K9 Pro (2021) 256GB"and "BLU G91 (2021) 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 K9 Pro (2021) 256GB64/10073.5mm x 158.7mm x 8.5mm
BLU G91 (2021) 128GB59/10076.0mm x 163.0mm x 9.0mm

Which one is easier to hold, "Oppo K9 Pro (2021) 256GB" or "BLU G91 (2021) 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 K9 Pro (2021) 256GB" weighs 180.0g. The "BLU G91 (2021) 128GB" clocks in at 196.0g. Comparing the weight of the main unit, the "Oppo K9 Pro (2021) 256GB" is a lighter phone than the "BLU G91 (2021) 128GB", with a difference of approximately 16g. Therefore, there is less strain on your fingers and wrists even when you use your phone for a long time on the "Oppo K9 Pro (2021) 256GB" compared to the "BLU G91 (2021) 128GB". For this reason, the "Oppo K9 Pro (2021) 256GB" is recommended.

ScoreWeight
Oppo K9 Pro (2021) 256GB58/100180.0g
BLU G91 (2021) 128GB52/100196.0g

Which is better in terms of display, "Oppo K9 Pro (2021) 256GB" or "BLU G91 (2021) 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 K9 Pro (2021) 256GB" is 6.43inch, and 6.5inch on the "BLU G91 (2021) 128GB". The screens of the "Oppo K9 Pro (2021) 256GB" and "BLU G91 (2021) 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 K9 Pro (2021) 256GB90/1006.43inch
BLU G91 (2021) 128GB90/1006.5inch

Which one has a better display, "Oppo K9 Pro (2021) 256GB" or "BLU G91 (2021) 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 K9 Pro (2021) 256GB" has a 1080 x 2400 resolution and a pixel density of 409ppi. The "BLU G91 (2021) 128GB", on the other hand, has a screen resolution of 720 x 1600 and a pixel density of 269ppi. Comparing the screen definition, the "Oppo K9 Pro (2021) 256GB" has a much higher pixel density than the "BLU G91 (2021) 128GB", with a difference of about 140ppi. The screen on the "Oppo K9 Pro (2021) 256GB" is clear and crisp, and puts less strain on the eyes than that of the "BLU G91 (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 K9 Pro (2021) 256GB" rather than the "BLU G91 (2021) 128GB".

ScorePixel density
Oppo K9 Pro (2021) 256GB85/100409ppi
BLU G91 (2021) 128GB54/100269ppi

How is the battery duration of "Oppo K9 Pro (2021) 256GB" different from that of "BLU G91 (2021) 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 K9 Pro (2021) 256GB - /100
BLU G91 (2021) 128GB - /100

Which is better in terms of CPU function, "Oppo K9 Pro (2021) 256GB" or "BLU G91 (2021) 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 K9 Pro (2021) 256GB" is equipped with a MediaTek MT6893 Dimensity 1200 5G processor, and its performance speed is 3.0GHz+2.6GHz+2.0GHz×8(8.0-cores). Comparing CPU performance, the "Oppo K9 Pro (2021) 256GB" has significantly higher specs than the "BLU G91 (2021) 128GB". The "Oppo K9 Pro (2021) 256GB" proves to be more advanced than the "BLU G91 (2021) 128GB" in the way that apps run quickly and games play smoothly. If you're looking for a high-spec smartphone that runs quickly and plays games smoothly, we recommend that you buy the "Oppo K9 Pro (2021) 256GB" rather than the "BLU G91 (2021) 128GB".

ScoreCPU specs
Oppo K9 Pro (2021) 256GB99/1003.0GHz+2.6GHz+2.0GHz×8(8.0-cores)
BLU G91 (2021) 128GB88/1001.8GHz×8(8.0-cores)

How is "Oppo K9 Pro (2021) 256GB" different from "BLU G91 (2021) 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 K9 Pro (2021) 256GB" has 12.0GB of memory. The "BLU G91 (2021) 128GB", on the other hand, has 4.0GB. As for memory performance, the "Oppo K9 Pro (2021) 256GB" has a larger memory capacity than the "BLU G91 (2021) 128GB", with a difference of about 8GB. The "Oppo K9 Pro (2021) 256GB" has better multitasking, less crashing, and runs 3D games and VR video better than the "BLU G91 (2021) 128GB". If you're looking for a smartphone that will remain stable even when you are using multiple apps at the same time, and which will allow you to play 3D games and VR video comfortably, we recommend that you buy the "Oppo K9 Pro (2021) 256GB" rather than the "BLU G91 (2021) 128GB".

ScoreRAM size
Oppo K9 Pro (2021) 256GB99/10012.0GB
BLU G91 (2021) 128GB70/1004.0GB

Which has a better storage capacity, "Oppo K9 Pro (2021) 256GB" or "BLU G91 (2021) 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 K9 Pro (2021) 256GB" has 256.0GB of storage, while the "BLU G91 (2021) 128GB" has 128.0GB. There is no real difference between the "Oppo K9 Pro (2021) 256GB"and "BLU G91 (2021) 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 K9 Pro (2021) 256GB91/100256.0GB
BLU G91 (2021) 128GB90/100128.0GB

Compare the rear cameras of "Oppo K9 Pro (2021) 256GB" and "BLU G91 (2021) 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 K9 Pro (2021) 256GB" has 64.0MP. The "BLU G91 (2021) 128GB" has 16.0MP. The rear-facing camera of the "Oppo K9 Pro (2021) 256GB" also has a higher pixel count than the "BLU G91 (2021) 128GB", with a difference of about 48MP. The "Oppo K9 Pro (2021) 256GB" is more capable than the "BLU G91 (2021) 128GB" of taking high-definition photos and videos, and produces better results when printing out the photos you have taken. If you want a smartphone that is designed for video and photography, we recommend buying the "Oppo K9 Pro (2021) 256GB" rather than the "BLU G91 (2021) 128GB".

ScoreRear-camera resolution
Oppo K9 Pro (2021) 256GB100/10064.0MP
BLU G91 (2021) 128GB68/10016.0MP

Which has a front camera with better picture quality, "Oppo K9 Pro (2021) 256GB" or "BLU G91 (2021) 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 K9 Pro (2021) 256GB" has a resolution of 16.0MP. The "BLU G91 (2021) 128GB"'s has 16.0MP. There is little difference between the camera capabilities and the pixel density of the "Oppo K9 Pro (2021) 256GB" and "BLU G91 (2021) 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 K9 Pro (2021) 256GB75/10016.0MP
BLU G91 (2021) 128GB75/10016.0MP

Compare Performance Specs

Oppo K9 Pro (2021) 256GBBLU G91 (2021) 128GB
ImageOppo K9 Pro (2021) 256GBBLU G91 (2021) 128GB
MakerOppoBLU
Release date2021-10-262021-02-24
ColorBlack/AuroraBlue/Green/Twilight
OSAndroidAndroid
Dimensions (width x height x thickness)73.5mm x 158.7mm x 8.5mm76.0mm x 163.0mm x 9.0mm
Weight180.0g196.0g
Display size6.43inch6.5inch
Display typeAMOLEDIPS LCD
Screen resolution (width x height)1080 x 2400720 x 1600
Pixel density409ppi269ppi
CPU specs3.0GHz+2.6GHz+2.0GHz×8(8.0-cores)1.8GHz×8(8.0-cores)
RAM size12.0GB4.0GB
Storage size256.0GB128.0GB
Rear-camera resolution64.0MP16.0MP
Front-camera resolution16.0MP16.0MP

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