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Vivo iQOO U3 128GB vs vivo Y91 (2018) 32GB: Specs & Scores

Created date: 2020-12-15 19:37:21

vivo iQOO U3 128GBvivo Y91 (2018) 32GB
vivo iQOO U3 128GBvivo Y91 (2018) 32GB

Are you having trouble comparing the differences in features and performance of the "vivo iQOO U3 128GB" and "vivo Y91 (2018) 32GB", 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 iQOO U3 128GBvivo Y91 (2018) 32GB
vivo iQOO U3 128GB

vivo Y91 (2018) 32GB

General rating:
Portabilityrating-image3.1
61/100
rating-image3.1
62/100
Weightrating-image2.8
56/100
rating-image3.2
64/100
Size of screenrating-image4.5
90/100
rating-image4.5
90/100
Screen clarityrating-image4.2
84/100
rating-image2.7
54/100
Battery durationrating-image
- /100
rating-image4.0
80/100
Processing capabilityrating-image4.7
93/100
rating-image3.6
71/100
Memory capacityrating-image4.7
93/100
rating-image3.0
60/100
Storage capacityrating-image4.5
90/100
rating-image2.8
55/100
Rear camera functionrating-image4.9
97/100
rating-image3.1
61/100
Front camera functionrating-image4.1
81/100
rating-image2.9
58/100

Compare Performance and Usability

Size comparison of "vivo iQOO U3 128GB" and "vivo Y91 (2018) 32GB". 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 iQOO U3 128GB" is 75.4mm wide, 164.2mm tall, and 8.4mm thick. The "vivo Y91 (2018) 32GB" is 75.1mm tall, 155.1mm wide, and 8.3mm thick.

There is no real difference between the "vivo iQOO U3 128GB" and "vivo Y91 (2018) 32GB" 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 iQOO U3 128GB" and "vivo Y91 (2018) 32GB", 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 iQOO U3 128GB"and "vivo Y91 (2018) 32GB". 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 iQOO U3 128GB61/10075.4mm x 164.2mm x 8.4mm
vivo Y91 (2018) 32GB62/10075.1mm x 155.1mm x 8.3mm

Which one is easier to hold, "vivo iQOO U3 128GB" or "vivo Y91 (2018) 32GB"? 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 iQOO U3 128GB" weighs 185.5g. The "vivo Y91 (2018) 32GB" clocks in at 163.5g. Comparing the weight of the main unit, the "vivo Y91 (2018) 32GB" is a lighter phone than the "vivo iQOO U3 128GB", with a difference of approximately 22g. Therefore, there is less strain on your fingers and wrists even when you use your phone for a long time on the "vivo Y91 (2018) 32GB" compared to the "vivo iQOO U3 128GB". For this reason, the "vivo Y91 (2018) 32GB" is recommended.

ScoreWeight
vivo iQOO U3 128GB56/100185.5g
vivo Y91 (2018) 32GB64/100163.5g

Which is better in terms of display, "vivo iQOO U3 128GB" or "vivo Y91 (2018) 32GB"?

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 iQOO U3 128GB" is 6.58inch, and 6.22inch on the "vivo Y91 (2018) 32GB". The screens of the "vivo iQOO U3 128GB" and "vivo Y91 (2018) 32GB" 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 iQOO U3 128GB90/1006.58inch
vivo Y91 (2018) 32GB90/1006.22inch

Which one has a better display, "vivo iQOO U3 128GB" or "vivo Y91 (2018) 32GB"?

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 iQOO U3 128GB" has a 1080 x 2400 resolution and a pixel density of 399ppi. The "vivo Y91 (2018) 32GB", on the other hand, has a screen resolution of 720 x 1520 and a pixel density of 270ppi. Comparing the screen definition, the "vivo iQOO U3 128GB" has a much higher pixel density than the "vivo Y91 (2018) 32GB", with a difference of about 129ppi. The screen on the "vivo iQOO U3 128GB" is clear and crisp, and puts less strain on the eyes than that of the "vivo Y91 (2018) 32GB". 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 "vivo iQOO U3 128GB" rather than the "vivo Y91 (2018) 32GB".

ScorePixel density
vivo iQOO U3 128GB84/100399ppi
vivo Y91 (2018) 32GB54/100270ppi

How is the battery duration of "vivo iQOO U3 128GB" different from that of "vivo Y91 (2018) 32GB" ? 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 iQOO U3 128GB - /100
vivo Y91 (2018) 32GB80/1004030.0mAh

Which is better in terms of CPU function, "vivo iQOO U3 128GB" or "vivo Y91 (2018) 32GB"?

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 iQOO U3 128GB" is equipped with a MediaTek Dimensity 800U 5G processor, and its performance speed is 2.4GHz+2.0GHz×8(8.0-cores). The "vivo Y91 (2018) 32GB" uses an Qualcomm SDM439 Snapdragon 439 CPU that performs at a speed of 1.95GHz+1.45GHz×8(8.0-cores). Comparing CPU performance, the "vivo iQOO U3 128GB" has significantly higher specs than the "vivo Y91 (2018) 32GB". The "vivo iQOO U3 128GB" proves to be more advanced than the "vivo Y91 (2018) 32GB" 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 "vivo iQOO U3 128GB" rather than the "vivo Y91 (2018) 32GB".

ScoreCPU specs
vivo iQOO U3 128GB93/1002.4GHz+2.0GHz×8(8.0-cores)
vivo Y91 (2018) 32GB71/1001.95GHz+1.45GHz×8(8.0-cores)

How is "vivo iQOO U3 128GB" different from "vivo Y91 (2018) 32GB" 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 iQOO U3 128GB" has 8.0GB of memory. The "vivo Y91 (2018) 32GB", on the other hand, has 3.0GB. As for memory performance, the "vivo iQOO U3 128GB" has a larger memory capacity than the "vivo Y91 (2018) 32GB", with a difference of about 5GB. The "vivo iQOO U3 128GB" has better multitasking, less crashing, and runs 3D games and VR video better than the "vivo Y91 (2018) 32GB". 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 "vivo iQOO U3 128GB" rather than the "vivo Y91 (2018) 32GB".

ScoreRAM size
vivo iQOO U3 128GB93/1008.0GB
vivo Y91 (2018) 32GB60/1003.0GB

Which has a better storage capacity, "vivo iQOO U3 128GB" or "vivo Y91 (2018) 32GB"?

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 iQOO U3 128GB" has 128.0GB of storage, while the "vivo Y91 (2018) 32GB" has 32.0GB. In terms of ROM and data storage, the "vivo iQOO U3 128GB" has a much larger capacity than the "vivo Y91 (2018) 32GB", with a difference of about 96GB. The "vivo iQOO U3 128GB" can save more photos and keep more apps installed than the "vivo Y91 (2018) 32GB". If you're searching for a smartphone that can store more data, we recommended that you buy the "vivo iQOO U3 128GB" rather than the "vivo Y91 (2018) 32GB".

ScoreStorage size
vivo iQOO U3 128GB90/100128.0GB
vivo Y91 (2018) 32GB55/10032.0GB

Compare the rear cameras of "vivo iQOO U3 128GB" and "vivo Y91 (2018) 32GB". 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 iQOO U3 128GB" has 48.0MP. The "vivo Y91 (2018) 32GB" has 13.0MP. The rear-facing camera of the "vivo iQOO U3 128GB" also has a higher pixel count than the "vivo Y91 (2018) 32GB", with a difference of about 35MP. The "vivo iQOO U3 128GB" is more capable than the "vivo Y91 (2018) 32GB" 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 "vivo iQOO U3 128GB" rather than the "vivo Y91 (2018) 32GB".

ScoreRear-camera resolution
vivo iQOO U3 128GB97/10048.0MP
vivo Y91 (2018) 32GB61/10013.0MP

Which has a front camera with better picture quality, "vivo iQOO U3 128GB" or "vivo Y91 (2018) 32GB"?

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 iQOO U3 128GB" has a resolution of 20.0MP. The "vivo Y91 (2018) 32GB"'s has 8.0MP. The front-facing camera of the "vivo iQOO U3 128GB" has a significantly higher number of pixels than the "vivo Y91 (2018) 32GB", with a difference of about 12MP. Therefore, the "vivo iQOO U3 128GB" is more suitable for taking photos and videos than the "vivo Y91 (2018) 32GB". If you want to take and print high-quality selfies, we recommend buying the "vivo iQOO U3 128GB" rather than the "vivo Y91 (2018) 32GB".

ScoreFront-camera resolution
vivo iQOO U3 128GB81/10020.0MP
vivo Y91 (2018) 32GB58/1008.0MP

Compare Performance Specs

vivo iQOO U3 128GBvivo Y91 (2018) 32GB
Imagevivo iQOO U3 128GBvivo Y91 (2018) 32GB
Makervivovivo
Release date2020-12-182018-11
ColorWhite/Gray/AuroraStarry Black/Ocean Blue
OSAndroidAndroid
Dimensions (width x height x thickness)75.4mm x 164.2mm x 8.4mm75.1mm x 155.1mm x 8.3mm
Weight185.5g163.5g
Display size6.58inch6.22inch
Display typeIPS LCDIPS LCD
Screen resolution (width x height)1080 x 2400720 x 1520
Pixel density399ppi270ppi
ChipsetMediaTek Dimensity 800U 5GQualcomm SDM439 Snapdragon 439
CPU specs2.4GHz+2.0GHz×8(8.0-cores)1.95GHz+1.45GHz×8(8.0-cores)
RAM size8.0GB3.0GB
Storage size128.0GB32.0GB
Rear-camera resolution48.0MP13.0MP
Front-camera resolution20.0MP8.0MP

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