Redmi K90 Ultra vs Xiaomi Mi A3
The Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite, while the Xiaomi Mi A3 (2019) runs on the Qualcomm Snapdragon 665. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 36/100 (a 37-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 4030); the main camera is 50 MP vs 48 MP; the Redmi K90 Ultra is faster in AnTuTu (3,233,695 vs 329,457); the Redmi K90 Ultra has NFC for contactless payments, the Xiaomi Mi A3 doesn't; the Xiaomi Mi A3 is noticeably lighter (173g vs 227g).
Profile comparison
Category scores
Redmi K90 Ultra
Xiaomi Mi A3
What makes Redmi K90 Ultra better?
- Higher AnTuTu: 3233695 vs 329457
- Better Geekbench Single: 3013 vs 321
- Better Geekbench Multi: 9287 vs 1128
- Bigger battery: 8550 vs 4030 mAh
- Faster charging: 100W vs 18W
- Better main camera: 50MP vs 48MP
- Higher performance (92/100 vs 24/100)
- Longer battery life (78/100 vs 22/100)
- Better display (94/100 vs 66/100)
What makes Xiaomi Mi A3 better?
- Lighter: 173g vs 227g
- Better camera (39/100 vs 37/100)
- Better portability (70/100 vs 40/100)
Comparison verdict
Comparing the Redmi K90 Ultra vs the Xiaomi Mi A3, the Redmi K90 Ultra scores 37 points higher (73/100 vs 36/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 24/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 22/100). In the "performance" category, the Redmi K90 Ultra significantly outperforms the Xiaomi Mi A3 (92/100 vs 24/100). In the "display" category, the Redmi K90 Ultra notably outperforms the Xiaomi Mi A3 (94/100 vs 66/100). In the "camera" category, the Xiaomi Mi A3 and the Redmi K90 Ultra are nearly equal (39/100 vs 37/100). In the "battery" category, the Redmi K90 Ultra significantly outperforms the Xiaomi Mi A3 (78/100 vs 22/100). In the "portability" category, the Xiaomi Mi A3 significantly outperforms the Redmi K90 Ultra (70/100 vs 40/100).
Specs comparison
| Specification | Redmi K90 Ultra | Xiaomi Mi A3 | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Qualcomm Snapdragon 665 | |
| AnTuTu | 3233695 | 329457 | |
| Geekbench Single | 3013 | 321 | |
| Geekbench Multi | 9287 | 1128 | |
| Display | 6.8" AMOLED | 6.0" Super AMOLED | |
| Resolution | 1280x2772 | 720x1560 | |
| Refresh rate | 165 Hz | — | |
| Battery | 8550 mAh | 4030 mAh | |
| Charging | 100W | 18W | |
| Main camera | 50 MP | 48 MP | |
| Ultrawide | 8 MP | 8 MP | |
| Front camera | 20 MP | 32 MP | |
| RAM | 12GB / 16GB | 4GB | |
| Storage | 256GB / 512GB | 128GB | |
| OS | Android 16 | Android 9.0 (Pie); Android One | |
| Brightness (peak) | 3500 nits | — | |
| NFC | yes | no | |
| Protection | IP68/IP69 | — | |
| Dimensions | 162.9×77.9×8.2 mm | 153.5×71.9×8.5 mm | |
| Weight | 227 g | 173 g | |
| Launch price | $420 | — |
Camera comparison
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Xiaomi Mi A3
- Main: 48MP f/1.8
- Ultrawide: 8MP
- Front: 32MP
Display comparison
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Xiaomi Mi A3
- 6.0" Super AMOLED
- Resolution: 720x1560
- Refresh rate: —
Battery and charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Xiaomi Mi A3
- 4030 mAh
- Wired: 18W
- No wireless charging
Overall performance score
We compared Redmi K90 Ultra and Xiaomi Mi A3, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Xiaomi Mi A3 by 881.5% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Xiaomi Mi A3
Price unknownDetailed category analysis
performance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the Xiaomi Mi A3 (92/100 vs 24/100).
display
In the "display" category, the Redmi K90 Ultra notably outperforms the Xiaomi Mi A3 (94/100 vs 66/100).
camera
In the "camera" category, the Xiaomi Mi A3 and the Redmi K90 Ultra are nearly equal (39/100 vs 37/100).
battery
In the "battery" category, the Redmi K90 Ultra significantly outperforms the Xiaomi Mi A3 (78/100 vs 22/100).
portability
In the "portability" category, the Xiaomi Mi A3 significantly outperforms the Redmi K90 Ultra (70/100 vs 40/100).
Frequently asked questions
Which is better: the Redmi K90 Ultra or the Xiaomi Mi A3?
The Redmi K90 Ultra significantly outperforms the Xiaomi Mi A3 by 37 points (73/100 vs 36/100).
What is the rating of the Redmi K90 Ultra and the Xiaomi Mi A3?
The Redmi K90 Ultra has a MobileRank rating of 73/100, the Xiaomi Mi A3 — 36/100.
Which is more powerful: the Redmi K90 Ultra or the Xiaomi Mi A3?
The Redmi K90 Ultra leads on performance (92/100 vs 24/100).
Should you choose the Redmi K90 Ultra over the Xiaomi Mi A3?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life.