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Galaxy A21s vs Redmi 9

Samsung Galaxy A21s vs Xiaomi Redmi 9

What Galaxy A21s does better (8) and where Redmi 9 wins (6) — every spec side by side.

Samsung · 2020Galaxy A21s

4.6Score

8 advantages≈ $240

Xiaomi · 2020Redmi 9

4.8Score

6 advantages≈ $120

Higher score

3.5Display3.1

2.2Performance2.2

5.7Camera5.0

4.0Battery5.9

5.0Features5.0

Dimensions

Size comparison

Galaxy A21sRedmi 9

	Galaxy A21s	Redmi 9	Difference
Height	163.7 mm	163.3 mm	+0.4 mm
Width	75.3 mm	77 mm	−1.7 mm
Thickness	8.9 mm	9.1 mm	−0.2 mm
Weight	192 g	198 g	−6 g

Drawn to the same scale from the official dimensions (front and side).

Why is Galaxy A21s better than Redmi 9?

Main camera48 MP vs 13 MP3.7×
Measured brightness490 nits vs 328 nits+49%
Peak brightness540 nits vs 400 nits+35%
Weight192 g vs 198 g+3%
Selfie camera13 MP vs 8 MP+62%
Process8 nm vs 12 nm+50%
Main camera aperturef/2 vs f/2.2+10%
Thickness8.9 mm vs 9.1 mm+2%

Why is Redmi 9 better than Galaxy A21s?

AnTuTu score107,157 vs 201,829+88%
Geekbench 6 (multi-core)1,100 vs 1,325+20%
Wired charging15 W vs 18 W+20%
Pixel density270 ppi vs 395 ppi+46%
Resolution (width)720 px vs 1,080 px+50%
Loudspeaker loudness-30 LUFS vs -26.9 LUFS+-10%

Specifications

Side by side

Only differences	Samsung Galaxy A21s≈ $2404.6	Xiaomi Redmi 9≈ $1204.8
Design
Weight	192 g	198 g
Thickness	8.9 mm	9.1 mm
Height	163.7 mm	163.3 mm
Width	75.3 mm	77 mm
Frame	Plastic	Plastic
Back	Plastic	Plastic
Glass protection	—	Corning Gorilla Glass 3
Colours	Black, White, Blue, Red	Carbon Gray, Sunset Purple, Ocean Green, Pink/Blue
Display
Screen size	6.5″	6.5″
Panel	PLS LCD	IPS LCD
OLED panel	No	No
Resolution (width)	720 px	1,080 px
Resolution (height)	1,600 px	2,340 px
Pixel density	270 ppi	395 ppi
Refresh rate	60 Hz	60 Hz
Peak brightness	540 nits	400 nits
Measured brightness	490 nits	328 nits
Screen-to-body ratio	82.8%	83.2%
Performance
Chipset	Exynos 850	Mediatek MT6769V/CU Helio G80
Chip maker	Exynos	MediaTek
Process	8 nm	12 nm
CPU cores	8	8
CPU frequency	2 GHz	2 GHz
GPU	Mali-G52	Mali-G52 MC2
AnTuTu score	107,157	201,829
Geekbench 6 (multi-core)	1,100	1,325
3DMark Wild Life Extreme	—	171
Memory
RAM	6 GB	6 GB
Storage (max)	128 GB	128 GB
Storage (base)	32 GB	32 GB
Storage type	eMMC 5.1	eMMC 5.1
Memory card slot	Yes	Yes
Camera
Main camera	48 MP	13 MP
Main camera aperture	f/2	f/2.2
Main sensor size	1/2.0"	1/3.1"
Rear cameras	2	2
Optical stabilisation	No	No
Ultra-wide camera	Yes	Yes
Telephoto camera	No	No
Max video	1080p	1080p
Selfie camera	13 MP	8 MP
4K selfie video	No	No
Battery
Battery capacity	5,000 mAh	5,020 mAh
Battery type	Li-Po	Li-Po
Wired charging	15 W	18 W
Charged in 30 min	25%	—
Wireless charging	No	No
Connectivity
5G	No	No
eSIM	No	No
Dual SIM	Yes	Yes
Wi-Fi standard	Wi-Fi 5	Wi-Fi 5
Bluetooth	5	5
NFC	Yes	Yes
USB	USB Type-C 2.0	USB Type-C 2.0
USB version	2	2
Infrared port	—	Yes
Satellite navigation	GLONASS, GALILEO, BDS	GLONASS, BDS
Features
Stereo speakers	No	No
3.5 mm headphone jack	Yes	Yes
Loudspeaker loudness	-30 LUFS	-26.9 LUFS
Fingerprint sensor	Rear	Rear
Sensors	Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass	Fingerprint (rear-mounted), accelerometer, proximity, compass
SAR (head)	0.42 W/kg	0.71 W/kg
Software
OS at launch	Android 10	Android 10
Platform	Android	Android
Interface	One UI 4.1	MIUI 13