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Vivo iQOO 3 5G 256GB and vivo X21 UD (2018) 128GB review

Created date: 2020-02-26 15:16:00, Updated date: 2021-10-20 17:27:42

vivo iQOO 3 5G 256GBvivo X21 UD (2018) 128GB
vivo iQOO 3 5G 256GBvivo X21 UD (2018) 128GB

How are the "vivo iQOO 3 5G 256GB" and "vivo X21 UD (2018) 128GB" different? We have tested and evaluated their differences. We also explain which one may be best for you.

vivo iQOO 3 5G 256GBvivo X21 UD (2018) 128GB
vivo iQOO 3 5G 256GB

vivo X21 UD (2018) 128GB

General rating:

80.2/100

(The 3022th of all smartphones)

71.1/100

(The 1038th of all smartphones)

Grip
47/100
59/100
Screen quality
81/100
79/100
Performance
99/100
96/100
Storage size
90/100
90/100
Battery
100/100
90/100
Rear-camera resolution
100/100
70/100
Front-camera resolution
100/100
100/100

What is the difference between the "vivo iQOO 3 5G 256GB" and the "vivo X21 UD (2018) 128GB"? See a detailed comparison of ease of use and performance

Comparison of weight and size of the "vivo iQOO 3 5G 256GB" and "vivo X21 UD (2018) 128GB"

The design of vivo iQOO 3 5G 256GB

The "vivo iQOO 3 5G 256GB" is 158.5mm long, 74.9mm wide, and 9.2mm thick. It weighs 214.5g.

The design of vivo X21 UD (2018) 128GB

The "vivo X21 UD (2018) 128GB" is 154.5mm long, 74.8mm wide, and 7.4mm thick. It weighs 156.2g.

Which is the better design to use?

In comparison, the size difference is 4mm in length, 0.1mm in width, and 1.7mm in thickness. Both the "vivo iQOO 3 5G 256GB" and "vivo X21 UD (2018) 128GB" are equally easy to use with one hand. Hiragana flick input is basically just as easy to use with "vivo iQOO 3 5G 256GB" and "vivo X21 UD (2018) 128GB". Both the "vivo iQOO 3 5G 256GB" and "vivo X21 UD (2018) 128GB" are basically equally portable and easy to handle.

The difference in weight is 58.3g. The "vivo X21 UD (2018) 128GB" is much lighter, putting less burden on the hand.

vivo iQOO 3 5G 256GB

vivo X21 UD (2018) 128GB

Ease of holding it in one hand62/10066/100
How much it does not feel heavy to hold in one hand9/10048/100
Ease of carrying around59/10061/100

Compare the display of the "vivo iQOO 3 5G 256GB" and "vivo X21 UD (2018) 128GB"

Display of the vivo iQOO 3 5G 256GB

The "vivo iQOO 3 5G 256GB" uses a Super AMOLED liquid crystal. The resolution is 1080 x 2400, and the pixel density is 408ppi. The "vivo iQOO 3 5G 256GB" has a 6.44inch screen size.

Display of the vivo X21 UD (2018) 128GB

The "vivo X21 UD (2018) 128GB" uses a Super AMOLED liquid crystal. The resolution is 1080 x 2280, and the pixel density is 401ppi. The "vivo X21 UD (2018) 128GB" has a 6.28inch screen size.

Which has a better screen?

This makes a 0.16inch difference in the display sizes. When actually viewing the two phones' onscreen displays, it is obvious that they are roughly the same size. For doing internet research using systems such as SNS, there is not much difference between the two phones. Both the "vivo iQOO 3 5G 256GB" and the "vivo X21 UD (2018) 128GB" can be easily used for this kind of purpose. The gaming screens of these two phones are roughly the same size. Both the "vivo iQOO 3 5G 256GB" and the "vivo X21 UD (2018) 128GB" can be easily used for this kind of purpose.

There is very little difference in the clarity of the displays of "vivo iQOO 3 5G 256GB" and "vivo X21 UD (2018) 128GB" when used for research, gaming, or other similar purposes. When using the smartphone as a VR, the screen is generally held much closer to the face than when using the smartphone for other purposes, and so the clarity of the screen becomes a rather important factor. When you compare how easy it is to see the VR on the two phones, it is pretty much the same.

vivo iQOO 3 5G 256GB

vivo X21 UD (2018) 128GB

How suited is the screen for usual usage?79/10078/100
How suited is the screen to play games on?83/10082/100

Compare the camera performances of the "vivo iQOO 3 5G 256GB" and "vivo X21 UD (2018) 128GB"

Camera performance of vivo iQOO 3 5G 256GB

The main camera of the "vivo iQOO 3 5G 256GB" has 48.0MP. The front camera has 16.0MP.

Camera performance of vivo X21 UD (2018) 128GB

The main camera of the "vivo X21 UD (2018) 128GB" has 12.0MP. The front camera has 12.0MP.

Which camera performance is better?

The back cameras thus have a 36MP difference in comparison. The "vivo iQOO 3 5G 256GB" also functions better for long-shot photos for the perfect group photo or a picturesque shot of a beautiful location. The "vivo iQOO 3 5G 256GB"'s rear camera triumphs as well, boasting a better megapixel count for close-up Instagram-worthy pictures of meals and desserts. Both the "vivo iQOO 3 5G 256GB" and the "vivo X21 UD (2018) 128GB" can be easily used for this kind of purpose.

There is a 4MP difference in front camera pixel number. The "vivo iQOO 3 5G 256GB"'s front camera also works terrifically well with selfie sticks and for capturing distant objects like the background scenery in your selfies. Both the "vivo iQOO 3 5G 256GB" and the "vivo X21 UD (2018) 128GB" can be easily used for this kind of purpose. There is not much difference between the pixel counts of "vivo iQOO 3 5G 256GB" and "vivo X21 UD (2018) 128GB" when it comes to taking close-up photographs such as selfies or profile pics with the front phone camera.

vivo iQOO 3 5G 256GB

vivo X21 UD (2018) 128GB

Is is suited to taking far away objects with the rear camera?100/10070/100
Is it suited for taking close objects with the built-in camera?100/100100/100

Comparison of the processing capabilities of the "vivo iQOO 3 5G 256GB" and "vivo X21 UD (2018) 128GB"

The processing capability of the vivo iQOO 3 5G 256GB

Performance is defined by the chipset, and the "vivo iQOO 3 5G 256GB" uses the Qualcomm SM8250 Snapdragon 865 SoC. The CPU performance is 2.84GHz+2.42GHz+1.8GHz×8(8.0-cores). The memory capacity is 12.0GB.

The processing capability of the vivo X21 UD (2018) 128GB

Performance is defined by the chipset, and the "vivo X21 UD (2018) 128GB" uses the Qualcomm SDM660 Snapdragon 660 SoC. The CPU performance is 2.2GHz+1.8GHz×8(8.0-cores). The memory capacity is 6.0GB.

Which has the better processing capability?

The CPU specs are the same for both phones. This is a 6GB difference in memory capacity. The "vivo iQOO 3 5G 256GB" has more memory storage, making the "vivo iQOO 3 5G 256GB" work better for multitasking or running 3D games.

For phone calls, emails, messaging, using SNS or most fundamental features, the differences between the "vivo iQOO 3 5G 256GB" and the "vivo X21 UD (2018) 128GB" are not large at all. For people who mainly use their phones to look things up online, watch videos and play games occasionally I can recommend the "vivo iQOO 3 5G 256GB" and the "vivo X21 UD (2018) 128GB" equally. Both the "vivo iQOO 3 5G 256GB" and the "vivo X21 UD (2018) 128GB" can be easily used for this kind of purpose.

There is basically no difference between "vivo iQOO 3 5G 256GB" and "vivo X21 UD (2018) 128GB" when playing 2D games or basic 3D games. For playing more memory-intensive 3D games, it is better to go with "vivo iQOO 3 5G 256GB" as it has better performance. Both the "vivo iQOO 3 5G 256GB" and the "vivo X21 UD (2018) 128GB" can be easily used for this kind of purpose.

vivo iQOO 3 5G 256GB

vivo X21 UD (2018) 128GB

Review on the CPU capbility and memory capacity when using Social Networks or the Internet100/10098/100
Review on the CPU speed and the memory capacity while playing 3D games99/10094/100

Comparison of the battery life of the "vivo iQOO 3 5G 256GB" and "vivo X21 UD (2018) 128GB"

Battery performance of vivo iQOO 3 5G 256GB

The "vivo iQOO 3 5G 256GB" has a battery capacity of 4400.0mAh.

Battery performance of vivo X21 UD (2018) 128GB

The "vivo X21 UD (2018) 128GB" has a battery capacity of 3200.0mAh.

Which battery perfomances is better?

This makes a difference in battery capacity of 1200mAh, but it is not enough to only compare the capacity. With a high-performance CPU, the battery drains faster, and a larger screen also uses more battery.

The "vivo iQOO 3 5G 256GB" is also a great choice for those who only use their phone for occasional phone calls or for checking the time. For people who tend to use their phone for looking up things on the internet, checking up on social media, or playing the occasional game, I recommend the "vivo iQOO 3 5G 256GB" over the "vivo X21 UD (2018) 128GB". Both the "vivo iQOO 3 5G 256GB" and the "vivo X21 UD (2018) 128GB" can be easily used for this kind of purpose.

The battery life of the "vivo iQOO 3 5G 256GB" is well equipped to handle long hours of gaming, video playback, and other kinds of frequent daily use. Both the "vivo iQOO 3 5G 256GB" and the "vivo X21 UD (2018) 128GB" can be easily used for this kind of purpose.

vivo iQOO 3 5G 256GB

vivo X21 UD (2018) 128GB

Review on the battery life of a phone mainly using Social Networks and the Internet100/10090/100
Review on the battery life of a phone mainly using mainly games and videos100/10078/100

Compare the storage capacity of the "vivo iQOO 3 5G 256GB" and "vivo X21 UD (2018) 128GB"

The storage capacity of the vivo iQOO 3 5G 256GB

The "vivo iQOO 3 5G 256GB" has 256.0GB of internal memory.

The storage capacity of the vivo X21 UD (2018) 128GB

The "vivo X21 UD (2018) 128GB" has 128.0GB of internal memory. It is also compatible with SD cards, so when there is insufficient storage space, then a SD card can be used to add more storage. A SD with a maximum of 256.0GB can be used.

Which has the easier storage to use?

The difference in internal memory is about 128GB. If you are only downloading a few games and apps (such as SNS) to use on your phone, it really doesn't matter if you choose "vivo iQOO 3 5G 256GB" or "vivo X21 UD (2018) 128GB". If you are hoping to install many different games on their phone, the amount of storage is the same no matter which of these two devices you choose to buy. Both the "vivo iQOO 3 5G 256GB" and the "vivo X21 UD (2018) 128GB" can be easily used for this kind of purpose.

Because the speed of loading from or saving to the SD card is slow, it is suited for saving pictures or videos.

vivo iQOO 3 5G 256GB

vivo X21 UD (2018) 128GB

Review on the storage capacity when playing many games90/10090/100
Review on when you store many pictures and videos - 92/100

Which to buy, the "vivo iQOO 3 5G 256GB" or "vivo X21 UD (2018) 128GB"

At the end of the day which is better, the "vivo iQOO 3 5G 256GB" or "vivo X21 UD (2018) 128GB"?

If you're looking for something that's easy to hold, the compact "vivo X21 UD (2018) 128GB" is a great choice. If choosing based on screen size, there is hardly any difference between "vivo iQOO 3 5G 256GB" and "vivo X21 UD (2018) 128GB". There isn't much difference between "vivo iQOO 3 5G 256GB" and "vivo X21 UD (2018) 128GB" in terms of performance or specifications. Because both have advantages and disadvantages, I think that it is best to stick to the most important points that you want to emphasize.

vivo iQOO 3 5G 256GB

vivo X21 UD (2018) 128GB

Handling47/10059/100
Display81/10079/100
CPU specs99/10096/100
General rating84/10081/100

Is it recommended to buy the vivo iQOO 3 5G 256GB, compared with other smartphones?

Compared to other smartphones, the "vivo iQOO 3 5G 256GB" is averagely easy to hold. Although it can be a little difficult, it is the right size to be able to operate with one hand. The screen size is larger than that of standard smartphones. It is suited for typing long texts and so can be used to read or edit office texts. In addition, its processing capability is quite excellent compared to the average smart phone. It is suitable for almost all uses, including games and VR. It may be a bit extravagant for normal use. Looking at the overall specifications, the "vivo iQOO 3 5G 256GB" is a high-end smart phone.

Is it recommended to buy the vivo X21 UD (2018) 128GB, compared with other smartphones?

Compared to other smartphones, the "vivo X21 UD (2018) 128GB" is averagely easy to hold. Although it can be a little difficult, it is the right size to be able to operate with one hand. The screen size is larger than that of standard smartphones. It is suited for typing long texts and so can be used to read or edit office texts. In addition, its processing capability is quite excellent compared to the average smart phone. It is suitable for almost all uses, including games and VR. It may be a bit extravagant for normal use. Looking at the overall specifications, the "vivo X21 UD (2018) 128GB" is a high-end smart phone.

What are the spec differences between the "vivo iQOO 3 5G 256GB" and "vivo X21 UD (2018) 128GB" ?

A summary of the technical specifications of the "vivo iQOO 3 5G 256GB" and "vivo X21 UD (2018) 128GB". Functions and performance variations on the same model will be highlighted in red.

vivo iQOO 3 5G 256GBvivo X21 UD (2018) 128GB
vivo iQOO 3 5G 256GBvivo X21 UD (2018) 128GB
ColorVolcano Orange/Tornado Black/Quantum SilverBlack/Ruby Red
OSAndroidAndroid
Dimensions (width x height x thickness)74.9mm x 158.5mm x 9.2mm74.8mm x 154.5mm x 7.4mm
Weight214.5g156.2g
Display size6.44inch6.28inch
Display typeSuper AMOLEDSuper AMOLED
Screen resolution (width x height)1080 x 24001080 x 2280
Pixel density408ppi401ppi
Battery capacity4400.0mAh3200.0mAh
ChipsetQualcomm SM8250 Snapdragon 865Qualcomm SDM660 Snapdragon 660
CPU specs2.84GHz+2.42GHz+1.8GHz×8(8.0-cores)2.2GHz+1.8GHz×8(8.0-cores)
RAM size12.0GB6.0GB
Storage size256.0GB128.0GB
Rear-camera resolution48.0MP12.0MP
Front-camera resolution16.0MP12.0MP

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