Xiaomi Redmi 9

Vivo Y21

os

Android 10, MIUI 12

Android 11, Funtouch 11.1

RAM

4 GB

4 GB

ROM

64 GB

64 GB

expandable

microSDXC (dedicated slot) GB

256 GB

CPU

Octa-core (2x2.0 GHz Cortex-A75 & 6x1.8 GHz Cortex-A55)

Octa-core (4x2.35 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53)

GPU

Mali-G52 MC2

PowerVR GE8320

SoC

Mediatek Helio G80 (12 nm)

Mediatek MT6765 Helio P35 (12nm)

number of cores

8core

8core

features

LED flash

featurues

HDR

primary

Quad:
13 MP, f/2.2, 28mm (wide), 1/3.1", 1.12m, PDAF
8 MP, f/2.2, 118 (ultrawide), 1/4.0", 1.12m
5 MP, f/2.4, (macro)
2 MP, f/2.4, (depth)

Dual:
13 MP, f/2.2, (wide), PDAF
2 MP, f/2.4, (macro)

secondary

8 MP, f/2.0, 27mm (wide)

8 MP, f/2.0, (wide)

video

1080p@30fps

1080p@30fps

capacity

5020mAh

5000mAh

charging

Fast charging 18W

Fast charging 18W

type

Li-Polymer (non-removable)

Li-Polymer (non-removable)

build

Glass front (Gorilla Glass 3), plastic back, plastic frame

color

Carbon Gray, Ocean Green, Blue

dimension

163.3 x 77 x 9.1 mm

164.3 x 76.1 x 8 mm

display

IPS LCD capacitive touchscreen, 16M colors

IPS LCD

resolution

1080 x 2340 pixels, 19.5:9 ratio (~395 ppi density)

720 x 1600 pixels, 20:9 ratio (~270 ppi density)

screen

6.53"

6.51"

weight

198 gm

182 gm

GPS

Yes, with A-GPS, GLONASS, GALILEO, BDS

USB

2.0, Type-C 1.0 reversible connector, USB On-The-Go

USB Type-C 2.0, USB On-The-Go

bluetooth

5.0, A2DP, LE

5.0, A2DP, LE

internet

GSM / HSPA / LTE

4G/LTE

wifi

Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot

Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot

radio

Wireless FM radio (no wired headphones required)

FM radio

sensors

Fingerprint (rear-mounted), accelerometer, proximity, compass

Fingerprint (side-mounted), accelerometer, gyro, proximity, compass