12 vs Y31
True-scale visual comparison — see exact mm dimensions side by side with detailed specs.
100% Objective Comparisons — Data sourced from official manufacturers
See our methodology
Choose how to display the two devices: stacked, overlapped, or split with a slider.
100%
Y31 is 0.8% taller
12
163.1mm×74.1mm
VS
Y31
164.4mm×76.1mm
Scaled to real proportions
Specifications Comparison
A
12
OnePlus
3 wins
B
Y31
vivo
4 wins
S
Screen Size
Better
12
6.7"
Y31
6.58"
Difference:
0.12"
(1.8% more)
B
Battery
Better
12
4,500mAh
Y31
5,000mAh
Difference:
500mAh
(11.1% more)
R
RAM
Better
12
12GB
Y31
8GB
Difference:
4GB
(50.0% more)
W
Weight
Better
12
211g
Y31
190g
Difference:
21g
(11.1% less)
S
Storage
Better
12
256GB
Y31
128GB
Difference:
128GB
(100.0% more)
M
Main Camera
= Tie
12
50MP
Y31
50MP
Difference:
0MP
P
Price
Better
12
999$
Y31
299$
Difference:
700$
(234.1% less)
H
Height
12
163.1mm
Y31
164.4mm
W
Width
12
74.1mm
Y31
76.1mm
T
Thickness
Better
12
8.7mm
Y31
8.3mm
Difference:
0.4mm
(4.8% less)
12
Y31
Winner in category
Last updated: March 23, 2026
Source: Official Source
Last updated: March 23, 2026
Source: Official Source
Why Trust Our Comparisons
Verified Data
All specs verified from official sources
No Affiliate Bias
We don't earn from product sales
Regularly Updated
Data refreshed when specs change
Transparent Method
Our comparison methodology is public