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Galaxy M21 2021 vs Redmi Note 10S

Samsung Galaxy M21 2021 vs Xiaomi Redmi Note 10S

What Galaxy M21 2021 does better (4) and where Redmi Note 10S wins (8) — every spec side by side.

Samsung · 2021Galaxy M21 2021

6.5Score

4 advantages≈ $140

Higher score

Xiaomi · 2021Redmi Note 10S

6.4Score

8 advantages≈ $170

5.0Display6.5

6.7Camera7.0

6.6Battery6.0

5.0Features4.6

Dimensions

Size comparison

Galaxy M21 2021Redmi Note 10S

	Galaxy M21 2021	Redmi Note 10S	Difference
Height	159 mm	160.5 mm	−1.5 mm
Width	75.1 mm	74.5 mm	+0.6 mm
Thickness	9 mm	8.3 mm	+0.7 mm
Weight	192 g	179 g	+13 g

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

Why is Galaxy M21 2021 better than Redmi Note 10S?

Battery capacity6,000 mAh vs 5,000 mAh+20%
CPU frequency2.3 GHz vs 2.05 GHz+12%
Selfie camera20 MP vs 13 MP+54%
Process10 nm vs 12 nm+20%

Why is Redmi Note 10S better than Galaxy M21 2021?

Wired charging15 W vs 33 W2.2×
Peak brightness420 nits vs 1,100 nits2.6×
Stereo speakersNo · Galaxy M21 2021: Yes
RAM6 GB vs 8 GB+33%
Main camera48 MP vs 64 MP+33%
Weight192 g vs 179 g+7%
Main camera aperturef/2 vs f/1.8+11%
Thickness9 mm vs 8.3 mm+8%

Specifications

Side by side

Only differences	Samsung Galaxy M21 2021≈ $1406.5	Xiaomi Redmi Note 10S≈ $1706.4
Design
Weight	192 g	179 g
Thickness	9 mm	8.3 mm
Height	159 mm	160.5 mm
Width	75.1 mm	74.5 mm
Frame	Plastic	Plastic
Back	Plastic	Plastic
Ingress protection	—	IP53
Water resistance (IPx)	—	IPx3
Glass protection	—	Corning Gorilla Glass 3
Colours	Charcoal Black, Arctic Blue	Deep Sea Blue (Ocean Blue), Shadow Black (Onyx Gray), (Frost White) Pebble White
Display
Screen size	6.4″	6.4″
Panel	Super AMOLED	AMOLED
OLED panel	Yes	Yes
Resolution (width)	1,080 px	1,080 px
Resolution (height)	2,340 px	2,400 px
Pixel density	403 ppi	409 ppi
Refresh rate	60 Hz	60 Hz
Peak brightness	420 nits	1,100 nits
Measured brightness	—	698 nits
Screen-to-body ratio	84.2%	83.5%
HDR	—	Yes
Performance
Chipset	Exynos 9611	Mediatek MT6785V/CD Helio G95
Chip maker	Exynos	MediaTek
Process	10 nm	12 nm
CPU cores	8	8
CPU frequency	2.3 GHz	2.05 GHz
GPU	Mali-G72 MP3	Mali-G76 MC4
AnTuTu score	—	530,335
Geekbench 6 (multi-core)	—	1,908
3DMark Wild Life Extreme	—	422
Memory
RAM	6 GB	8 GB
Storage (max)	128 GB	128 GB
Storage (base)	64 GB	64 GB
Storage type	—	UFS 2.2
Memory card slot	Yes	Yes
Camera
Main camera	48 MP	64 MP
Main camera aperture	f/2	f/1.8
Main sensor size	1/2.0"	1/1.97"
Rear cameras	2	2
Optical stabilisation	No	No
Ultra-wide camera	Yes	Yes
Telephoto camera	No	No
Max video	4K	4K
4K video frame rate	30 fps	30 fps
Selfie camera	20 MP	13 MP
4K selfie video	No	No
Battery
Battery capacity	6,000 mAh	5,000 mAh
Battery type	Li-Po	Li-Po
Wired charging	15 W	33 W
Charged in 30 min	—	43%
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	5.1
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, GALILEO, BDS
Features
Stereo speakers	No	Yes
3.5 mm headphone jack	Yes	Yes
Fingerprint sensor	Rear	Side
Sensors	Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass	Fingerprint (side-mounted), accelerometer, gyro, compass
SAR (head)	0.47 W/kg	0.6 W/kg
Software
OS at launch	Android 11	Android 11
Platform	Android	Android
Interface	One UI 3.1 Core	MIUI 14