Redmi K90 vs Sony Xperia XA2 Ultra
The Redmi K90 (2025) runs on the Qualcomm Snapdragon 8 Elite, while the Sony Xperia XA2 Ultra (2018) runs on the Snapdragon 630; launch prices were $401 and $449. By overall MobileRank rating, the Redmi K90 leads — 76/100 vs 19/100 (a 57-point difference). Key differences: the Redmi K90 has the bigger battery (7100 mAh vs 3580); the main camera is 50 MP vs 23 MP; the Redmi K90 is faster in AnTuTu (3,086,235 vs 215,323); the Redmi K90 is noticeably lighter (206g vs 221g).
Redmi K90
Sony Xperia XA2 Ultra
- Higher AnTuTu: 3086235 vs 215323
- Better Geekbench Single: 3041 vs 181
- Better Geekbench Multi: 9494 vs 960
- Bigger battery: 7100 vs 3580 mAh
- Faster charging: 100W vs 18W
- Better main camera: 50MP vs 23MP
- Higher refresh rate: 120Hz vs 60Hz
- Lighter: 206g vs 221g
- Cheaper at launch: $401 vs $449
- Higher performance (92/100 vs 15/100)
- Better camera (58/100 vs 18/100)
- Longer battery life (72/100 vs 13/100)
- Better display (82/100 vs 40/100)
- Better portability (55/100 vs 30/100)
- Overall rating 19/100
Comparing the Redmi K90 vs the Sony Xperia XA2 Ultra, the Redmi K90 scores 57 points higher (76/100 vs 19/100). In the "performance" category, the Redmi K90 leads (92/100 vs 15/100). In the "camera" category, the Redmi K90 leads (58/100 vs 18/100). In the "battery" category, the Redmi K90 leads (72/100 vs 13/100). Value score: Redmi K90 — 90/100, Sony Xperia XA2 Ultra — 0/100; it is biased by price level, so it should not be compared directly between devices at different prices. In the "performance" category, the Redmi K90 significantly outperforms the Sony Xperia XA2 Ultra (92/100 vs 15/100). In the "display" category, the Redmi K90 significantly outperforms the Sony Xperia XA2 Ultra (82/100 vs 40/100). In the "camera" category, the Redmi K90 significantly outperforms the Sony Xperia XA2 Ultra (58/100 vs 18/100). In the "battery" category, the Redmi K90 significantly outperforms the Sony Xperia XA2 Ultra (72/100 vs 13/100). In the "portability" category, the Redmi K90 notably outperforms the Sony Xperia XA2 Ultra (55/100 vs 30/100).
| Specification | Redmi K90 | Sony Xperia XA2 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Snapdragon 630 | |
| AnTuTu | 3086235 | 215323 | |
| Geekbench Single | 3041 | 181 | |
| Geekbench Multi | 9494 | 960 | |
| Display | 6.6" AMOLED | 6.0" IPS LCD | |
| Resolution | 2510x1156 | 1080x1920 | |
| Refresh rate | 120 Hz | 60 Hz | |
| Battery | 7100 mAh | 3580 mAh | |
| Charging | 100W | 18W | |
| Main camera | 50 MP | 23 MP | |
| Ultrawide | 8 MP | 0 MP | |
| Telephoto | 50 MP | 0 MP | |
| Front camera | 20 MP | 16 MP | |
| RAM | 12GB / 16GB | 4GB | |
| Storage | 256GB / 512GB | 32GB / 64GB | |
| OS | Android 16 | Android 8.0 | |
| Brightness (peak) | 3500 nits | — | |
| NFC | yes | yes | |
| Protection | IP68 | — | |
| Dimensions | 157.5×75.3×8.0 mm | 163.0×80.0×9.5 mm | |
| Weight | 206 g | 221 g | |
| Launch price | $401 | $449 |
Redmi K90
- Main: 50MP f/f/1.9
- Ultrawide: 8MP
- Telephoto: 50MP
- Front: 20MP
Sony Xperia XA2 Ultra
- Main: 23MP f/f/2.0
- Front: 16MP
Redmi K90
- 6.6" AMOLED
- Resolution: 2510x1156
- Refresh rate: 120 Hz
Sony Xperia XA2 Ultra
- 6.0" IPS LCD
- Resolution: 1080x1920
- Refresh rate: 60 Hz
Redmi K90
- 7100 mAh
- Wired: 100W
- No wireless charging
Sony Xperia XA2 Ultra
- 3580 mAh
- Wired: 18W
- No wireless charging
We compared Redmi K90 and Sony Xperia XA2 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 leads Sony Xperia XA2 Ultra by 1333.3% in our overall performance rating.
Launch price difference: $48. Redmi K90 was $48 cheaper at launch.
performance
In the "performance" category, the Redmi K90 significantly outperforms the Sony Xperia XA2 Ultra (92/100 vs 15/100).
display
In the "display" category, the Redmi K90 significantly outperforms the Sony Xperia XA2 Ultra (82/100 vs 40/100).
camera
In the "camera" category, the Redmi K90 significantly outperforms the Sony Xperia XA2 Ultra (58/100 vs 18/100).
battery
In the "battery" category, the Redmi K90 significantly outperforms the Sony Xperia XA2 Ultra (72/100 vs 13/100).
portability
In the "portability" category, the Redmi K90 notably outperforms the Sony Xperia XA2 Ultra (55/100 vs 30/100).
Which is better: the Redmi K90 or the Sony Xperia XA2 Ultra?
The Redmi K90 significantly outperforms the Sony Xperia XA2 Ultra by 57 points (76/100 vs 19/100).
What is the rating of the Redmi K90 and the Sony Xperia XA2 Ultra?
The Redmi K90 has a MobileRank rating of 76/100, the Sony Xperia XA2 Ultra — 19/100.
Which has the better camera: the Redmi K90 or the Sony Xperia XA2 Ultra?
The Redmi K90 leads on camera score (58/100 vs 18/100).
Which is more powerful: the Redmi K90 or the Sony Xperia XA2 Ultra?
The Redmi K90 leads on performance (92/100 vs 15/100).
Should you choose the Redmi K90 over the Sony Xperia XA2 Ultra?
The Redmi K90 is a better fit for gamers and power users, budget-conscious buyers. The Sony Xperia XA2 Ultra is a better fit for everyday use.