Samsung Galaxy S21 Ultra 5G vs Xiaomi Redmi 13C

Compare Samsung Galaxy S21 Ultra 5G vs Xiaomi Redmi 13C side by side: Exynos 2100 / Snapdragon 888 5G (5 nm) vs MediaTek Helio G85 (12 nm), 108MP vs 50MP…

Samsung

Redmi 13C

$129

7categories won

1 categories tied · 20 scored in total · add a third phone

Information Gain

Which one wins?

MxMob Algorithmic Verdict

Xiaomi Redmi 13C takes the overall win

Overall Pick

The Xiaomi Redmi 13C proves superior overall against the Samsung Galaxy S21 Ultra 5G, outperforming on battery endurance and daily usability. In camera testing, the Galaxy S21 Ultra 5G leads with sharper imaging, while battery endurance leans towards the Redmi 13C. Choose the Redmi 13C if you want the highest performance ceiling, or opt for the Galaxy S21 Ultra 5G if its specific hardware strengths better fit your budget.

🔋 BatteryRedmi 13C

Redmi 13C takes battery honors offering 5,000 mAh alongside 18W charging.

🎮 GamingRedmi 13C

Redmi 13C provides greater sustained gaming output with its MediaTek Helio G85 (12 nm) and 8GB RAM.

📸 CameraGalaxy S21 Ultra 5G

Galaxy S21 Ultra 5G wins photography with 108MP main imaging and 10x dedicated optical zoom.

🏷️ ValueRedmi 13C

Redmi 13C wins on budget and value at $129 compared to $1199.

Category verdicts are computed algorithmically from verified technical specifications and hardware benchmarks. Rows where neither figure is objectively better — screen size preference, operating system choice, aesthetic build materials — are displayed for direct reference without scoring bias.

Galaxy S21 Ultra 5G vs Redmi 13C: specifications compared

Display

Display comparison between the Samsung Galaxy S21 Ultra 5G, Xiaomi Redmi 13C
Specification	Galaxy S21 Ultra 5G	Redmi 13C
Screen size	6.8"	6.74"
Resolution	1440 x 3200Winner	720 x 1600
Pixel density	516 ppiWinner	260 ppi
Refresh rate	120 HzWinner	90 Hz
Peak brightness	1500 nitsWinner	600 nits

Performance

Performance comparison between the Samsung Galaxy S21 Ultra 5G, Xiaomi Redmi 13C
Specification	Galaxy S21 Ultra 5G	Redmi 13C
Chipset	Exynos 2100 / Snapdragon 888 5G (5 nm)	MediaTek Helio G85 (12 nm)
Process node	5 nmWinner	12 nm
AnTuTu score	870,000	3,200,000Winner
Geekbench multi	3800	10800Winner
Maximum RAM	12 GBWinner	8 GB
Maximum storage	128GB	256GBWinner

Camera

Camera comparison between the Samsung Galaxy S21 Ultra 5G, Xiaomi Redmi 13C
Specification	Galaxy S21 Ultra 5G	Redmi 13C
Main sensor	108 MPWinner	50 MP
Rear cameras	4Winner	3
Optical zoom	10x	—
Ultrawide	12 MP	—
Selfie camera	40 MPWinner	8 MP
Max video	8K at 24fps / 4K at 60fps all cameras	1080p at 30fps

Battery and charging

Battery and charging comparison between the Samsung Galaxy S21 Ultra 5G, Xiaomi Redmi 13C
Specification	Galaxy S21 Ultra 5G	Redmi 13C
Capacity	5,000 mAh	5,000 mAh
Wired charging	25 WWinner	18 W
Wireless charging	15 W	25 WWinner

Design

Design comparison between the Samsung Galaxy S21 Ultra 5G, Xiaomi Redmi 13C
Specification	Galaxy S21 Ultra 5G	Redmi 13C
Weight	227 g	192 gWinner
Thickness	8.9 mm	8.09 mmWinner
Water resistance	IP68	IP52
Build	Aluminum frame, Gorilla Glass Victus front and back	Corning Gorilla Glass front, composite plastic frame and matte textured back

Software and support

Software and support comparison between the Samsung Galaxy S21 Ultra 5G, Xiaomi Redmi 13C
Specification	Galaxy S21 Ultra 5G	Redmi 13C
Operating system	Android 11	Android 13, upgradable to Android 14 (HyperOS)
OS updates	4 yearsWinner	2 years
Security updates	5 yearsWinner	2 years

Connectivity and value

Connectivity and value comparison between the Samsung Galaxy S21 Ultra 5G, Xiaomi Redmi 13C
Specification	Galaxy S21 Ultra 5G	Redmi 13C
5G	Yes	Yes
Wi-Fi	Wi-Fi 6E (802.11ax)	Wi-Fi 7 (802.11be, tri-band 2.4/5/6GHz, 320MHz bandwidth)
Storage expansion	None	microSD
3.5mm jack	No	No
Launch price	$1,199	$129Winner