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Which is better, vivo Y31 (2021) 128GB or LG K40 (2019) 32GB? We compared their features and specs in detail

Created date: 2021-01-21 21:21:16

vivo Y31 (2021) 128GBLG K40 (2019) 32GB
vivo Y31 (2021) 128GBLG K40 (2019) 32GB

Are you having trouble comparing the differences in features and performance of the "vivo Y31 (2021) 128GB" and "LG K40 (2019) 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 Y31 (2021) 128GBLG K40 (2019) 32GB
vivo Y31 (2021) 128GB

LG K40 (2019) 32GB

General rating:

73.7/100

(The - of all smartphones)

64/100

(The 3601th of all smartphones)

Portability
61/100
67/100
Weight
55/100
72/100
Size of screen
90/100
85/100
Screen clarity
84/100
57/100
Battery duration
- /100
65/100
Processing capability
89/100
88/100
Memory capacity
90/100
60/100
Storage capacity
90/100
55/100
Rear camera function
97/100
68/100
Front camera function
75/100
58/100

Compare Performance and Usability

Size comparison of "vivo Y31 (2021) 128GB" and "LG K40 (2019) 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 Y31 (2021) 128GB" is 75.3mm wide, 163.9mm tall, and 8.4mm thick. The "LG K40 (2019) 32GB" is 71.9mm tall, 153.0mm wide, and 8.3mm thick.

Comparing the width and thickness of the main unit, the "LG K40 (2019) 32GB" is smaller and more compact compared to the "vivo Y31 (2021) 128GB". Therefore, it is easier to grip and hold the "LG K40 (2019) 32GB" than the "vivo Y31 (2021) 128GB". For this reason, the "LG K40 (2019) 32GB" is recommended.

There is no real difference in length or width between the "vivo Y31 (2021) 128GB" and "LG K40 (2019) 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.

Comparing the overall size of the main unit, the "LG K40 (2019) 32GB" is smaller than the "vivo Y31 (2021) 128GB". As a result, it is easier to use the "LG K40 (2019) 32GB" with one hand compared to the "vivo Y31 (2021) 128GB", and its size makes it more comfortable to carry around. For this reason, the "LG K40 (2019) 32GB" is recommended.

ScoreDimensions (width x height x thickness)
vivo Y31 (2021) 128GB61/10075.3mm x 163.9mm x 8.4mm
LG K40 (2019) 32GB67/10071.9mm x 153.0mm x 8.3mm

Which one is easier to hold, "vivo Y31 (2021) 128GB" or "LG K40 (2019) 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 Y31 (2021) 128GB" weighs 188.0g. The "LG K40 (2019) 32GB" clocks in at 144.0g. If you compare the weight of the two, the "LG K40 (2019) 32GB" is a considerably lighter smartphone than the "vivo Y31 (2021) 128GB", with a difference of about 44g. Because of this, the "LG K40 (2019) 32GB" puts less of a burden on the fingers and wrists than the "vivo Y31 (2021) 128GB". If you want a smartphone that won't tire your hands out even when using it for a long time, we recommend that you buy the "LG K40 (2019) 32GB" rather than the "vivo Y31 (2021) 128GB".

ScoreWeight
vivo Y31 (2021) 128GB55/100188.0g
LG K40 (2019) 32GB72/100144.0g

Which is better in terms of display, "vivo Y31 (2021) 128GB" or "LG K40 (2019) 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 Y31 (2021) 128GB" is 6.58inch, and 5.7inch on the "LG K40 (2019) 32GB". Comparing the size of the display and screen, the screen size of the "vivo Y31 (2021) 128GB" is larger than that of the "LG K40 (2019) 32GB", with a difference of approximately 0.87inch. As a result, there will be unintended touches on the "vivo Y31 (2021) 128GB" compared to the "LG K40 (2019) 32GB" and it is possible to enjoy games and videos on a large screen. For this reason, the "vivo Y31 (2021) 128GB" is recommended.

ScoreDisplay size
vivo Y31 (2021) 128GB90/1006.58inch
LG K40 (2019) 32GB85/1005.7inch

Which one has a better display, "vivo Y31 (2021) 128GB" or "LG K40 (2019) 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 Y31 (2021) 128GB" has a 1080 x 2408 resolution and a pixel density of 401ppi. The "LG K40 (2019) 32GB", on the other hand, has a screen resolution of 720 x 1440 and a pixel density of 282ppi. Comparing the screen definition, the "vivo Y31 (2021) 128GB" has a much higher pixel density than the "LG K40 (2019) 32GB", with a difference of about 119ppi. The screen on the "vivo Y31 (2021) 128GB" is clear and crisp, and puts less strain on the eyes than that of the "LG K40 (2019) 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 Y31 (2021) 128GB" rather than the "LG K40 (2019) 32GB".

ScorePixel density
vivo Y31 (2021) 128GB84/100401ppi
LG K40 (2019) 32GB57/100282ppi

How is the battery duration of "vivo Y31 (2021) 128GB" different from that of "LG K40 (2019) 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 Y31 (2021) 128GB - /100
LG K40 (2019) 32GB65/1003000.0mAh

Which is better in terms of CPU function, "vivo Y31 (2021) 128GB" or "LG K40 (2019) 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 Y31 (2021) 128GB" is equipped with a Qualcomm SM6115 Snapdragon 662 processor, and its performance speed is 2.0GHz+1.8GHz×8(8.0-cores). The "LG K40 (2019) 32GB" uses an Mediatek MT6762 Helio P22 CPU that performs at a speed of 2.0GHz×8(8.0-cores). There is also no real discrepancy between the CPU performances of the "vivo Y31 (2021) 128GB" and "LG K40 (2019) 32GB". 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 Y31 (2021) 128GB89/1002.0GHz+1.8GHz×8(8.0-cores)
LG K40 (2019) 32GB88/1002.0GHz×8(8.0-cores)

How is "vivo Y31 (2021) 128GB" different from "LG K40 (2019) 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 Y31 (2021) 128GB" has 6.0GB of memory. The "LG K40 (2019) 32GB", on the other hand, has 3.0GB. As for memory performance, the "vivo Y31 (2021) 128GB" has a larger memory capacity than the "LG K40 (2019) 32GB", with a difference of about 3GB. The "vivo Y31 (2021) 128GB" has better multitasking, less crashing, and runs 3D games and VR video better than the "LG K40 (2019) 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 Y31 (2021) 128GB" rather than the "LG K40 (2019) 32GB".

ScoreRAM size
vivo Y31 (2021) 128GB90/1006.0GB
LG K40 (2019) 32GB60/1003.0GB

Which has a better storage capacity, "vivo Y31 (2021) 128GB" or "LG K40 (2019) 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 Y31 (2021) 128GB" has 128.0GB of storage, while the "LG K40 (2019) 32GB" has 32.0GB. In terms of ROM and data storage, the "vivo Y31 (2021) 128GB" has a much larger capacity than the "LG K40 (2019) 32GB", with a difference of about 96GB. The "vivo Y31 (2021) 128GB" can save more photos and keep more apps installed than the "LG K40 (2019) 32GB". If you're searching for a smartphone that can store more data, we recommended that you buy the "vivo Y31 (2021) 128GB" rather than the "LG K40 (2019) 32GB".

ScoreStorage size
vivo Y31 (2021) 128GB90/100128.0GB
LG K40 (2019) 32GB55/10032.0GB

Compare the rear cameras of "vivo Y31 (2021) 128GB" and "LG K40 (2019) 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 Y31 (2021) 128GB" has 48.0MP. The "LG K40 (2019) 32GB" has 16.0MP. The rear-facing camera of the "vivo Y31 (2021) 128GB" also has a higher pixel count than the "LG K40 (2019) 32GB", with a difference of about 32MP. The "vivo Y31 (2021) 128GB" is more capable than the "LG K40 (2019) 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 Y31 (2021) 128GB" rather than the "LG K40 (2019) 32GB".

ScoreRear-camera resolution
vivo Y31 (2021) 128GB97/10048.0MP
LG K40 (2019) 32GB68/10016.0MP

Which has a front camera with better picture quality, "vivo Y31 (2021) 128GB" or "LG K40 (2019) 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 Y31 (2021) 128GB" has a resolution of 16.0MP. The "LG K40 (2019) 32GB"'s has 8.0MP. The front-facing camera of the "vivo Y31 (2021) 128GB" has a significantly higher number of pixels than the "LG K40 (2019) 32GB", with a difference of about 8MP. Therefore, the "vivo Y31 (2021) 128GB" is more suitable for taking photos and videos than the "LG K40 (2019) 32GB". If you want to take and print high-quality selfies, we recommend buying the "vivo Y31 (2021) 128GB" rather than the "LG K40 (2019) 32GB".

ScoreFront-camera resolution
vivo Y31 (2021) 128GB75/10016.0MP
LG K40 (2019) 32GB58/1008.0MP

Compare Performance Specs

vivo Y31 (2021) 128GBLG K40 (2019) 32GB
Imagevivo Y31 (2021) 128GBLG K40 (2019) 32GB
MakervivoLG
Release date2021-01-202019-04
ColorRacing Black/Ocean BlueBlack/New Moroccan Blue/New Platinum Gray
OSAndroidAndroid
Dimensions (width x height x thickness)75.3mm x 163.9mm x 8.4mm71.9mm x 153.0mm x 8.3mm
Weight188.0g144.0g
Display size6.58inch5.7inch
Display typeIPS LCDIPS LCD
Screen resolution (width x height)1080 x 2408720 x 1440
Pixel density401ppi282ppi
ChipsetQualcomm SM6115 Snapdragon 662Mediatek MT6762 Helio P22
CPU specs2.0GHz+1.8GHz×8(8.0-cores)2.0GHz×8(8.0-cores)
RAM size6.0GB3.0GB
Storage size128.0GB32.0GB
Rear-camera resolution48.0MP16.0MP
Front-camera resolution16.0MP8.0MP

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