Samsung Galaxy S21 Ultra 5G vs Xiaomi 17 Pro

Compare Samsung Galaxy S21 Ultra 5G vs Xiaomi 17 Pro side by side: Exynos 2100 / Snapdragon 888 5G (5 nm) vs Qualcomm Snapdragon 8 Elite, 108MP vs 50MP…

Samsung

17 Pro

$999

14categories won

2 categories tied · 22 scored in total · add a third phone

Information Gain

Which one wins?

MxMob Algorithmic Verdict

Xiaomi 17 Pro takes the overall win

Overall Pick

The Xiaomi 17 Pro 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 17 Pro. Choose the 17 Pro if you want the highest performance ceiling, or opt for the Galaxy S21 Ultra 5G if its specific hardware strengths better fit your budget.

🔋 Battery17 Pro

17 Pro takes battery honors offering 5,500 mAh alongside 90W charging.

🎮 Gaming17 Pro

17 Pro provides greater sustained gaming output with its Qualcomm Snapdragon 8 Elite and 16GB RAM.

📸 CameraGalaxy S21 Ultra 5G

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

🏷️ Value17 Pro

17 Pro wins on budget and value at $999 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 17 Pro: specifications compared

Display

Display comparison between the Samsung Galaxy S21 Ultra 5G, Xiaomi 17 Pro
Specification	Galaxy S21 Ultra 5G	17 Pro
Screen size	6.8"	6.36"
Resolution	1440 x 3200Winner	1200 x 2670
Pixel density	516 ppiWinner	460 ppi
Refresh rate	120 Hz	120 Hz
Peak brightness	1500 nits	3200 nitsWinner

Performance

Performance comparison between the Samsung Galaxy S21 Ultra 5G, Xiaomi 17 Pro
Specification	Galaxy S21 Ultra 5G	17 Pro
Chipset	Exynos 2100 / Snapdragon 888 5G (5 nm)	Qualcomm Snapdragon 8 Elite
Process node	5 nm	3 nmWinner
AnTuTu score	870,000	3,060,000Winner
Geekbench multi	3800	10420Winner
Maximum RAM	12 GB	16 GBWinner
Maximum storage	128GB	1TBWinner

Camera

Camera comparison between the Samsung Galaxy S21 Ultra 5G, Xiaomi 17 Pro
Specification	Galaxy S21 Ultra 5G	17 Pro
Main sensor	108 MPWinner	50 MP
Rear cameras	4Winner	3
Optical zoom	10xWinner	3.2x
Ultrawide	12 MP	50 MPWinner
Selfie camera	40 MPWinner	32 MP
Max video	8K at 24fps / 4K at 60fps all cameras	8K@30fps

Battery and charging

Battery and charging comparison between the Samsung Galaxy S21 Ultra 5G, Xiaomi 17 Pro
Specification	Galaxy S21 Ultra 5G	17 Pro
Capacity	5,000 mAh	5,500 mAhWinner
Wired charging	25 W	90 WWinner
Wireless charging	15 W	50 WWinner

Design

Design comparison between the Samsung Galaxy S21 Ultra 5G, Xiaomi 17 Pro
Specification	Galaxy S21 Ultra 5G	17 Pro
Weight	227 g	191 gWinner
Thickness	8.9 mm	8.2 mmWinner
Water resistance	IP68	IP68
Build	Aluminum frame, Gorilla Glass Victus front and back	Xiaomi Dragon Crystal Glass 2.0 front, high-strength polished aluminum alloy frame, velvet frosted glass rear

Software and support

Software and support comparison between the Samsung Galaxy S21 Ultra 5G, Xiaomi 17 Pro
Specification	Galaxy S21 Ultra 5G	17 Pro
Operating system	Android 11	Android 16 (HyperOS 3)
OS updates	4 years	5 yearsWinner
Security updates	5 years	5 years

Connectivity and value

Connectivity and value comparison between the Samsung Galaxy S21 Ultra 5G, Xiaomi 17 Pro
Specification	Galaxy S21 Ultra 5G	17 Pro
5G	Yes	Yes
Wi-Fi	Wi-Fi 6E (802.11ax)	Wi-Fi 7 (802.11be), tri-band, Wi-Fi Direct
Storage expansion	None	None
3.5mm jack	No	No
Launch price	$1,199	$999Winner