Samsung Galaxy S21 Ultra vs Xiaomi 17 Ultra
The Samsung Galaxy S21 Ultra (2021) runs on the Samsung Exynos 2100, while the Xiaomi 17 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite Gen 5; estimated prices are $1199 and $999. By overall MobileRank rating, the Xiaomi 17 Ultra leads — 82/100 vs 37/100 (a 45-point difference). Key differences: the Xiaomi 17 Ultra has the bigger battery (6000 mAh vs 5000); the main camera is 108 MP vs 50 MP; the Xiaomi 17 Ultra is faster in AnTuTu (3,593,401 vs 1,074,182); per DXOMark lab testing, the Xiaomi 17 Ultra has the stronger camera (166 vs 117).
Samsung Galaxy S21 Ultra
Xiaomi 17 Ultra
- Better main camera: 108MP vs 50MP
- Overall rating 37/100
- Higher AnTuTu: 3593401 vs 1074182
- Better Geekbench Single: 3640 vs 1435
- Better Geekbench Multi: 11033 vs 3555
- Bigger battery: 6000 vs 5000 mAh
- Faster charging: 90W vs 25W
- Faster wireless charging: 50W vs 15W
- Lighter: 226g vs 228g
- Cheaper: $999 vs $1199
- Higher performance (87/100 vs 10/100)
- Better camera (93/100 vs 55/100)
- Longer battery life (72/100 vs 40/100)
- Better design/ergonomics (17/100 vs 15/100)
- Better value for money (41/100 vs 27/100)
Comparing the Samsung Galaxy S21 Ultra vs the Xiaomi 17 Ultra, the Xiaomi 17 Ultra scores 45 points higher (82/100 vs 37/100). In the "performance" category, the Xiaomi 17 Ultra leads (87/100 vs 10/100). In the "camera" category, the Xiaomi 17 Ultra leads (93/100 vs 55/100). In the "battery" category, the Xiaomi 17 Ultra leads (72/100 vs 40/100). In the "value for money" category, the Xiaomi 17 Ultra leads (41/100 vs 27/100). In the "performance" category, the Xiaomi 17 Ultra significantly outperforms the Samsung Galaxy S21 Ultra (87/100 vs 10/100). In the "display" category, both devices are on the same level — 100/100. In the "camera" category, the Xiaomi 17 Ultra significantly outperforms the Samsung Galaxy S21 Ultra (93/100 vs 55/100). In the "battery" category, the Xiaomi 17 Ultra significantly outperforms the Samsung Galaxy S21 Ultra (72/100 vs 40/100). In the "design" category, the Xiaomi 17 Ultra and the Samsung Galaxy S21 Ultra are nearly equal (17/100 vs 15/100). In the "value for money" category, the Xiaomi 17 Ultra is a bit better (41/100 vs 27/100).
| Specification | Samsung Galaxy S21 Ultra | Xiaomi 17 Ultra | |
|---|---|---|---|
| Processor | Samsung Exynos 2100 | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | 1074182 | 3593401 | |
| Geekbench Single | 1435 | 3640 | |
| Geekbench Multi | 3555 | 11033 | |
| Display | 6.8" AMOLED | 6.8" LTPO AMOLED | |
| Resolution | 3200x1440 | 3200x1440 | |
| Refresh rate | 120 Hz | 120 Hz | |
| Battery | 5000 mAh | 6000 mAh | |
| Charging | 25W | 90W | |
| Wireless charging | 15W | 50W | |
| DXOMark (camera) | 117 | 166 | |
| Main camera | 108 MP | 50 MP | |
| Ultrawide | 12 MP | 50 MP | |
| Telephoto | 10 MP | 200 MP | |
| Front camera | 40 MP | 32 MP | |
| RAM | 12GB / 16GB | 12GB / 16GB | |
| Storage | 128GB / 256GB / 512GB | 256GB / 512GB / 1TB | |
| OS | Android 11 | Android 16 | |
| Brightness (peak) | — | 3500 nits | |
| NFC | — | yes | |
| Protection | — | IP68 | |
| Dimensions | — | 162.9×77.6×8.3 mm | |
| Weight | 228 g | 226 g | |
| Price | $1199 | $999 |
Samsung Galaxy S21 Ultra
- Main: 108MP f/1.8
- Ultrawide: 12MP
- Telephoto: 10MP
- Front: 40MP
Xiaomi 17 Ultra
- Main: 50MP f/1.63
- Ultrawide: 50MP
- Telephoto: 200MP
- Front: 32MP
Samsung Galaxy S21 Ultra
- 6.8" AMOLED
- Resolution: 3200x1440
- Refresh rate: 120 Hz
Xiaomi 17 Ultra
- 6.8" LTPO AMOLED
- Resolution: 3200x1440
- Refresh rate: 120 Hz
Samsung Galaxy S21 Ultra
- 5000 mAh
- Wired: 25W
- Wireless: 15W
Xiaomi 17 Ultra
- 6000 mAh
- NanoReview test: web browsing 16:09 hrs, total 33:23 hrs
- Wired: 90W
- Wireless: 50W
We compared Samsung Galaxy S21 Ultra and Xiaomi 17 Ultra, covering their specs and all relevant benchmarks.
Xiaomi 17 Ultra leads Samsung Galaxy S21 Ultra by 70.1% in our overall performance rating.
Price difference: $200. Xiaomi 17 Ultra is cheaper by $200.
performance
In the "performance" category, the Xiaomi 17 Ultra significantly outperforms the Samsung Galaxy S21 Ultra (87/100 vs 10/100).
display
In the "display" category, both devices are on the same level — 100/100.
camera
In the "camera" category, the Xiaomi 17 Ultra significantly outperforms the Samsung Galaxy S21 Ultra (93/100 vs 55/100).
battery
In the "battery" category, the Xiaomi 17 Ultra significantly outperforms the Samsung Galaxy S21 Ultra (72/100 vs 40/100).
design
In the "design" category, the Xiaomi 17 Ultra and the Samsung Galaxy S21 Ultra are nearly equal (17/100 vs 15/100).
value for money
In the "value for money" category, the Xiaomi 17 Ultra is a bit better (41/100 vs 27/100).
Which is better: the Samsung Galaxy S21 Ultra or the Xiaomi 17 Ultra?
The Xiaomi 17 Ultra significantly outperforms the Samsung Galaxy S21 Ultra by 45 points (82/100 vs 37/100).
What is the rating of the Samsung Galaxy S21 Ultra and the Xiaomi 17 Ultra?
The Samsung Galaxy S21 Ultra has a MobileRank rating of 37/100, the Xiaomi 17 Ultra — 82/100.
Which has the better camera: the Samsung Galaxy S21 Ultra or the Xiaomi 17 Ultra?
The Xiaomi 17 Ultra leads on camera score (93/100 vs 55/100).
Which is more powerful: the Samsung Galaxy S21 Ultra or the Xiaomi 17 Ultra?
The Xiaomi 17 Ultra leads on performance (87/100 vs 10/100).
Should you choose the Samsung Galaxy S21 Ultra over the Xiaomi 17 Ultra?
The Samsung Galaxy S21 Ultra is a better fit for everyday use. The Xiaomi 17 Ultra is a better fit for gamers and power users, mobile photography enthusiasts.