Samsung Galaxy A21s vs Xiaomi 15 Ultra
The Samsung Galaxy A21s (2020) runs on the Exynos 850, while the Xiaomi 15 Ultra (2025) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $215 and $999. By overall MobileRank rating, the Xiaomi 15 Ultra leads — 85/100 vs 29/100 (a 56-point difference). Key differences: the Xiaomi 15 Ultra has the bigger battery (6000 mAh vs 5000); the main camera is 48 MP vs 50 MP; the Xiaomi 15 Ultra is faster in AnTuTu (3,030,376 vs 234,339); the Samsung Galaxy A21s is noticeably lighter (192g vs 225g).
Samsung Galaxy A21s
Xiaomi 15 Ultra
- Lighter: 192g vs 225g
- Cheaper at launch: $215 vs $999
- Better portability (55/100 vs 29/100)
- Higher AnTuTu: 3030376 vs 234339
- Better Geekbench Single: 3050 vs 300
- Better Geekbench Multi: 10200 vs 836
- Bigger battery: 6000 vs 5000 mAh
- Better main camera: 50MP vs 48MP
- Higher refresh rate: 120Hz vs 60Hz
- Higher performance (92/100 vs 16/100)
- Better camera (87/100 vs 30/100)
- Longer battery life (80/100 vs 52/100)
- Better display (90/100 vs 32/100)
Comparing the Samsung Galaxy A21s vs the Xiaomi 15 Ultra, the Xiaomi 15 Ultra scores 56 points higher (85/100 vs 29/100). In the "performance" category, the Xiaomi 15 Ultra leads (92/100 vs 16/100). In the "camera" category, the Xiaomi 15 Ultra leads (87/100 vs 30/100). In the "battery" category, the Xiaomi 15 Ultra leads (80/100 vs 52/100). Value score: Samsung Galaxy A21s — 18/100, Xiaomi 15 Ultra — 82/100; it is biased by price level, so it should not be compared directly between devices at different prices. In the "performance" category, the Xiaomi 15 Ultra significantly outperforms the Samsung Galaxy A21s (92/100 vs 16/100). In the "display" category, the Xiaomi 15 Ultra significantly outperforms the Samsung Galaxy A21s (90/100 vs 32/100). In the "camera" category, the Xiaomi 15 Ultra significantly outperforms the Samsung Galaxy A21s (87/100 vs 30/100). In the "battery" category, the Xiaomi 15 Ultra notably outperforms the Samsung Galaxy A21s (80/100 vs 52/100). In the "portability" category, the Samsung Galaxy A21s notably outperforms the Xiaomi 15 Ultra (55/100 vs 29/100).
| Specification | Samsung Galaxy A21s | Xiaomi 15 Ultra | |
|---|---|---|---|
| Processor | Exynos 850 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 234339 | 3030376 | |
| Geekbench Single | 300 | 3050 | |
| Geekbench Multi | 836 | 10200 | |
| Display | 6.5" IPS LCD | 6.7" LTPO AMOLED | |
| Resolution | — | 3200x1440 | |
| Refresh rate | 60 Hz | 120 Hz | |
| Battery | 5000 mAh | 6000 mAh | |
| Charging | — | 90W | |
| Wireless charging | 0W | 50W | |
| DXOMark (camera) | — | 159 | |
| Main camera | 48 MP | 50 MP | |
| Ultrawide | 0 MP | 50 MP | |
| Telephoto | 0 MP | 50 MP | |
| Front camera | 13 MP | 32 MP | |
| RAM | 3GB / 4GB / 6GB | 16GB | |
| Storage | 32GB / 64GB | 256GB / 512GB / 1TB | |
| OS | — | Android 15 / HyperOS 2 | |
| Brightness (peak) | — | 3200 nits | |
| NFC | yes | yes | |
| Protection | — | IP68 | |
| Dimensions | 163.7×75.3×8.9 mm | 161.3×75.3×9.4 mm | |
| Weight | 192 g | 225 g | |
| Launch price | $215 | $999 |
Samsung Galaxy A21s
- Main: 48MP
- Front: 13MP
Xiaomi 15 Ultra
- Main: 50MP f/f/1.63
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Samsung Galaxy A21s
- 6.5" IPS LCD
- Refresh rate: 60 Hz
Xiaomi 15 Ultra
- 6.7" LTPO AMOLED
- Resolution: 3200x1440
- Refresh rate: 120 Hz
Samsung Galaxy A21s
- 5000 mAh
- No wireless charging
Xiaomi 15 Ultra
- 6000 mAh
- NanoReview test: web browsing 12:19 hrs, total 30:03 hrs
- Wired: 90W
- Wireless: 50W
We compared Samsung Galaxy A21s and Xiaomi 15 Ultra, covering their specs and all relevant benchmarks.
Xiaomi 15 Ultra leads Samsung Galaxy A21s by 92.3% in our overall performance rating.
Launch price difference: $784. Samsung Galaxy A21s was $784 cheaper at launch.
performance
In the "performance" category, the Xiaomi 15 Ultra significantly outperforms the Samsung Galaxy A21s (92/100 vs 16/100).
display
In the "display" category, the Xiaomi 15 Ultra significantly outperforms the Samsung Galaxy A21s (90/100 vs 32/100).
camera
In the "camera" category, the Xiaomi 15 Ultra significantly outperforms the Samsung Galaxy A21s (87/100 vs 30/100).
battery
In the "battery" category, the Xiaomi 15 Ultra notably outperforms the Samsung Galaxy A21s (80/100 vs 52/100).
portability
In the "portability" category, the Samsung Galaxy A21s notably outperforms the Xiaomi 15 Ultra (55/100 vs 29/100).
Which is better: the Samsung Galaxy A21s or the Xiaomi 15 Ultra?
The Xiaomi 15 Ultra significantly outperforms the Samsung Galaxy A21s by 56 points (85/100 vs 29/100).
What is the rating of the Samsung Galaxy A21s and the Xiaomi 15 Ultra?
The Samsung Galaxy A21s has a MobileRank rating of 29/100, the Xiaomi 15 Ultra — 85/100.
Which has the better camera: the Samsung Galaxy A21s or the Xiaomi 15 Ultra?
The Xiaomi 15 Ultra leads on camera score (87/100 vs 30/100).
Which is more powerful: the Samsung Galaxy A21s or the Xiaomi 15 Ultra?
The Xiaomi 15 Ultra leads on performance (92/100 vs 16/100).
Should you choose the Samsung Galaxy A21s over the Xiaomi 15 Ultra?
The Samsung Galaxy A21s is a better fit for everyday use. The Xiaomi 15 Ultra is a better fit for gamers and power users, mobile photography enthusiasts, those who care about battery life, budget-conscious buyers.