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Galaxy S21 Ultra 5G vs Mi 11i

Samsung Galaxy S21 Ultra 5G vs Xiaomi Mi 11i

What Galaxy S21 Ultra 5G does better (19) and where Mi 11i wins (6) — every spec side by side.

Samsung · 2021Galaxy S21 Ultra 5G

9.0Score

19 advantages≈ $260

Higher score

Xiaomi · 2021Mi 11i

7.9Score

6 advantages≈ $250

9.1Display7.9

6.7Performance6.1

9.8Camera8.5

6.2Battery4.2

9.4Features6.9

Dimensions

Size comparison

Galaxy S21 Ultra 5GMi 11i

	Galaxy S21 Ultra 5G	Mi 11i	Difference
Height	165.1 mm	163.7 mm	+1.4 mm
Width	75.6 mm	76.4 mm	−0.8 mm
Thickness	8.9 mm	7.8 mm	+1.1 mm
Weight	227 g	196 g	+31 g

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

Why is Galaxy S21 Ultra 5G better than Mi 11i?

RAM16 GB vs 8 GB2×
Water resistance (IPx)IPx8 vs IPx32.7×
Optical zoom10× vs 2.1×4.8×
Storage (max)512 GB vs 256 GB2×
Optical stabilisationYes · Mi 11i: No
Wireless chargingYes · Mi 11i: No
Battery capacity5,000 mAh vs 4,520 mAh+11%
Pixel density515 ppi vs 395 ppi+30%
Rear cameras4 vs 22×
Selfie camera40 MP vs 20 MP2×
4K selfie videoYes · Mi 11i: No
eSIMYes · Mi 11i: No

Why is Mi 11i better than Galaxy S21 Ultra 5G?

Wired charging25 W vs 33 W+32%
AnTuTu score657,150 vs 690,021+5%
Geekbench 6 (multi-core)3,518 vs 3,641+3%
Weight227 g vs 196 g+16%
Thickness8.9 mm vs 7.8 mm+14%
Charged in 30 min54% vs 58%+7%

Specifications

Side by side

Only differences	Samsung Galaxy S21 Ultra 5G≈ $2609.0	Xiaomi Mi 11i≈ $2507.9
Design
Weight	227 g	196 g
Thickness	8.9 mm	7.8 mm
Height	165.1 mm	163.7 mm
Width	75.6 mm	76.4 mm
Frame	Aluminium	—
Back	Glass	—
Ingress protection	IP68	IP53
Water resistance (IPx)	IPx8	IPx3
Glass protection	Corning Gorilla Glass Victus	Corning Gorilla Glass 5
Colours	Phantom Black, Phantom Silver, Phantom Titanium, Phantom Navy, Phantom Brown, Navy	Celestial Silver, Frosty White, Cosmic Black
Stylus	Yes	—
Display
Screen size	6.8″	6.7″
Panel	Dynamic AMOLED 2X	Super AMOLED
OLED panel	Yes	Yes
Resolution (width)	1,440 px	1,080 px
Resolution (height)	3,200 px	2,400 px
Pixel density	515 ppi	395 ppi
Refresh rate	120 Hz	120 Hz
Peak brightness	1,500 nits	1,300 nits
Measured brightness	1,023 nits	939 nits
Screen-to-body ratio	89.8%	85.9%
HDR	Yes	Yes
Performance
Chipset	Exynos 2100 - International	Qualcomm SM8350 Snapdragon 888 5G
Chip maker	Qualcomm	Qualcomm
Process	5 nm	5 nm
CPU cores	8	8
CPU frequency	2.9 GHz	2.84 GHz
GPU	Mali-G78 MP14 - International Adreno 660 - USA/China	Adreno 660
AnTuTu score	657,150	690,021
Geekbench 6 (multi-core)	3,518	3,641
Memory
RAM	16 GB	8 GB
Storage (max)	512 GB	256 GB
Storage (base)	128 GB	128 GB
Storage type	UFS 3.1	UFS 3.1
Memory card slot	No	No
Camera
Main camera	108 MP	108 MP
Main camera aperture	f/1.8	f/1.8
Main sensor size	1/1.33"	1/1.52"
Rear cameras	4	2
Optical stabilisation	Yes	No
Ultra-wide camera	Yes	Yes
Telephoto camera	Yes	Yes
Optical zoom	10×	2.1×
Max video	8K	8K
4K video frame rate	60 fps	60 fps
Selfie camera	40 MP	20 MP
4K selfie video	Yes	No
Battery
Battery capacity	5,000 mAh	4,520 mAh
Battery type	Li-Ion	Li-Po
Wired charging	25 W	33 W
Charged in 30 min	54%	58%
Wireless charging	Yes	No
Wireless charging power	15 W	—
Reverse wireless charging	Yes	—
Connectivity
5G	Yes	Yes
eSIM	Yes	No
Dual SIM	Yes	Yes
Wi-Fi standard	Wi-Fi 6E	Wi-Fi 6
Bluetooth	5.2	5.2
NFC	Yes	Yes
USB	USB Type-C 3.2	USB Type-C 2.0
USB version	3.2	2
Ultra Wideband	Yes	—
Dual-band GPS	—	Yes
Satellite navigation	GLONASS, GALILEO, BDS	GLONASS, GALILEO, BDS, QZSS, NavIC
Features
Stereo speakers	Yes	Yes
3.5 mm headphone jack	No	No
Loudspeaker loudness	-25.5 LUFS	-26 LUFS
Fingerprint sensor	Under display, ultrasonic	Side
Barometer	Yes	Yes
Sensors	Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer	Fingerprint (side-mounted), accelerometer, gyro, proximity, compass, barometer
SAR (head)	0.71 W/kg	0.57 W/kg
Software
OS at launch	Android 11	Android 11
Platform	Android	Android
Interface	One UI 7	MIUI 12
Major OS updates promised	4	—