Vivo Y21 vs Xiaomi 15 Ultra
The Vivo Y21 (2026) runs on the MediaTek Dimensity 6300, while the Xiaomi 15 Ultra (2025) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $178 and $999. By overall MobileRank rating, the Xiaomi 15 Ultra leads — 85/100 vs 44/100 (a 41-point difference). Key differences: the Vivo Y21 has the bigger battery (6500 mAh vs 6000); the Xiaomi 15 Ultra is faster in AnTuTu (3,030,376 vs 524,785); the Vivo Y21 is noticeably lighter (209g vs 225g).
Vivo Y21
Xiaomi 15 Ultra
- Bigger battery: 6500 vs 6000 mAh
- Lighter: 209g vs 225g
- Cheaper at launch: $178 vs $999
- Better portability (49/100 vs 29/100)
- Higher AnTuTu: 3030376 vs 524785
- Better Geekbench Single: 3050 vs 771
- Better Geekbench Multi: 10200 vs 1980
- Faster charging: 90W vs 44W
- Higher performance (92/100 vs 43/100)
- Better camera (87/100 vs 30/100)
- Longer battery life (80/100 vs 58/100)
- Better display (90/100 vs 55/100)
Comparing the Vivo Y21 vs the Xiaomi 15 Ultra, the Xiaomi 15 Ultra scores 41 points higher (85/100 vs 44/100). In the "performance" category, the Xiaomi 15 Ultra leads (92/100 vs 43/100). 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 58/100). Value score: Vivo Y21 — 56/100, 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 Vivo Y21 (92/100 vs 43/100). In the "display" category, the Xiaomi 15 Ultra significantly outperforms the Vivo Y21 (90/100 vs 55/100). In the "camera" category, the Xiaomi 15 Ultra significantly outperforms the Vivo Y21 (87/100 vs 30/100). In the "battery" category, the Xiaomi 15 Ultra notably outperforms the Vivo Y21 (80/100 vs 58/100). In the "portability" category, the Vivo Y21 notably outperforms the Xiaomi 15 Ultra (49/100 vs 29/100).
| Specification | Vivo Y21 | Xiaomi 15 Ultra | |
|---|---|---|---|
| Processor | MediaTek Dimensity 6300 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 524785 | 3030376 | |
| Geekbench Single | 771 | 3050 | |
| Geekbench Multi | 1980 | 10200 | |
| Display | 6.7" IPS LCD | 6.7" LTPO AMOLED | |
| Resolution | 720x1600 | 3200x1440 | |
| Refresh rate | 120 Hz | 120 Hz | |
| Battery | 6500 mAh | 6000 mAh | |
| Charging | 44W | 90W | |
| Wireless charging | 0W | 50W | |
| DXOMark (camera) | — | 159 | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 0 MP | 50 MP | |
| Telephoto | 0 MP | 50 MP | |
| Front camera | 5 MP | 32 MP | |
| RAM | 4GB / 6GB / 8GB | 16GB | |
| Storage | 128GB | 256GB / 512GB / 1TB | |
| OS | Android 16, OriginOS 6 | Android 15 / HyperOS 2 | |
| Brightness (peak) | 1200 nits | 3200 nits | |
| NFC | yes | yes | |
| Protection | IP65 | IP68 | |
| Dimensions | 167.4×77.1×8.4 mm | 161.3×75.3×9.4 mm | |
| Weight | 209 g | 225 g | |
| Launch price | $178 | $999 |
Vivo Y21
- Main: 50MP f/f/1.8
- Front: 5MP
Xiaomi 15 Ultra
- Main: 50MP f/f/1.63
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Vivo Y21
- 6.7" IPS LCD
- Resolution: 720x1600
- Refresh rate: 120 Hz
Xiaomi 15 Ultra
- 6.7" LTPO AMOLED
- Resolution: 3200x1440
- Refresh rate: 120 Hz
Vivo Y21
- 6500 mAh
- Wired: 44W
- 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 Vivo Y21 and Xiaomi 15 Ultra, covering their specs and all relevant benchmarks.
Xiaomi 15 Ultra leads Vivo Y21 by 82.7% in our overall performance rating.
Launch price difference: $821. Vivo Y21 was $821 cheaper at launch.
performance
In the "performance" category, the Xiaomi 15 Ultra significantly outperforms the Vivo Y21 (92/100 vs 43/100).
display
In the "display" category, the Xiaomi 15 Ultra significantly outperforms the Vivo Y21 (90/100 vs 55/100).
camera
In the "camera" category, the Xiaomi 15 Ultra significantly outperforms the Vivo Y21 (87/100 vs 30/100).
battery
In the "battery" category, the Xiaomi 15 Ultra notably outperforms the Vivo Y21 (80/100 vs 58/100).
portability
In the "portability" category, the Vivo Y21 notably outperforms the Xiaomi 15 Ultra (49/100 vs 29/100).
Which is better: the Vivo Y21 or the Xiaomi 15 Ultra?
The Xiaomi 15 Ultra significantly outperforms the Vivo Y21 by 41 points (85/100 vs 44/100).
What is the rating of the Vivo Y21 and the Xiaomi 15 Ultra?
The Vivo Y21 has a MobileRank rating of 44/100, the Xiaomi 15 Ultra — 85/100.
Which has the better camera: the Vivo Y21 or the Xiaomi 15 Ultra?
The Xiaomi 15 Ultra leads on camera score (87/100 vs 30/100).
Which is more powerful: the Vivo Y21 or the Xiaomi 15 Ultra?
The Xiaomi 15 Ultra leads on performance (92/100 vs 43/100).
Should you choose the Vivo Y21 over the Xiaomi 15 Ultra?
The Vivo Y21 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.