Redmi K90 Ultra vs Sony Xperia XZ2 Compact
The Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite, while the Sony Xperia XZ2 Compact (2018) runs on the Snapdragon 845; launch prices were $420 and $649. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 31/100 (a 42-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 2870); the main camera is 50 MP vs 19 MP; the Redmi K90 Ultra is faster in AnTuTu (3,233,695 vs 595,284); the Sony Xperia XZ2 Compact is noticeably lighter (168g vs 227g).
Redmi K90 Ultra
Sony Xperia XZ2 Compact
- Higher AnTuTu: 3233695 vs 595284
- Better Geekbench Single: 3041 vs 563
- Better Geekbench Multi: 9494 vs 2006
- Bigger battery: 8550 vs 2870 mAh
- Faster charging: 100W vs 18W
- Better main camera: 50MP vs 19MP
- Higher refresh rate: 165Hz vs 60Hz
- Cheaper at launch: $420 vs $649
- Higher performance (92/100 vs 41/100)
- Better camera (37/100 vs 13/100)
- Longer battery life (78/100 vs 12/100)
- Better display (94/100 vs 49/100)
- Lighter: 168g vs 227g
- Better portability (63/100 vs 40/100)
Comparing the Redmi K90 Ultra vs the Sony Xperia XZ2 Compact, the Redmi K90 Ultra scores 42 points higher (73/100 vs 31/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 41/100). In the "camera" category, the Redmi K90 Ultra leads (37/100 vs 13/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 12/100). Value score: Redmi K90 Ultra — 82/100, Sony Xperia XZ2 Compact — 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 Ultra significantly outperforms the Sony Xperia XZ2 Compact (92/100 vs 41/100). In the "display" category, the Redmi K90 Ultra significantly outperforms the Sony Xperia XZ2 Compact (94/100 vs 49/100). In the "camera" category, the Redmi K90 Ultra notably outperforms the Sony Xperia XZ2 Compact (37/100 vs 13/100). In the "battery" category, the Redmi K90 Ultra significantly outperforms the Sony Xperia XZ2 Compact (78/100 vs 12/100). In the "portability" category, the Sony Xperia XZ2 Compact notably outperforms the Redmi K90 Ultra (63/100 vs 40/100).
| Specification | Redmi K90 Ultra | Sony Xperia XZ2 Compact | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Snapdragon 845 | |
| AnTuTu | 3233695 | 595284 | |
| Geekbench Single | 3041 | 563 | |
| Geekbench Multi | 9494 | 2006 | |
| Display | 6.8" AMOLED | 5.0" IPS LCD | |
| Resolution | 1280x2772 | 1080x2160 | |
| Refresh rate | 165 Hz | 60 Hz | |
| Battery | 8550 mAh | 2870 mAh | |
| Charging | 100W | 18W | |
| Main camera | 50 MP | 19 MP | |
| Ultrawide | 8 MP | 0 MP | |
| Front camera | 20 MP | 5 MP | |
| RAM | 12GB / 16GB | 4GB | |
| Storage | 256GB / 512GB | 64GB | |
| OS | Android 16 | Android 8.0 | |
| Brightness (peak) | 3500 nits | — | |
| NFC | yes | yes | |
| Protection | IP68/IP69 | IP65/IP68 | |
| Dimensions | 162.9×77.9×8.2 mm | 135.0×65.0×12.1 mm | |
| Weight | 227 g | 168 g | |
| Launch price | $420 | $649 |
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Sony Xperia XZ2 Compact
- Main: 19MP f/f/2.0
- Front: 5MP
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Sony Xperia XZ2 Compact
- 5.0" IPS LCD
- Resolution: 1080x2160
- Refresh rate: 60 Hz
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Sony Xperia XZ2 Compact
- 2870 mAh
- Wired: 18W
- No wireless charging
We compared Redmi K90 Ultra and Sony Xperia XZ2 Compact, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Sony Xperia XZ2 Compact by 443.2% in our overall performance rating.
Launch price difference: $229. Redmi K90 Ultra was $229 cheaper at launch.
performance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the Sony Xperia XZ2 Compact (92/100 vs 41/100).
display
In the "display" category, the Redmi K90 Ultra significantly outperforms the Sony Xperia XZ2 Compact (94/100 vs 49/100).
camera
In the "camera" category, the Redmi K90 Ultra notably outperforms the Sony Xperia XZ2 Compact (37/100 vs 13/100).
battery
In the "battery" category, the Redmi K90 Ultra significantly outperforms the Sony Xperia XZ2 Compact (78/100 vs 12/100).
portability
In the "portability" category, the Sony Xperia XZ2 Compact notably outperforms the Redmi K90 Ultra (63/100 vs 40/100).
Which is better: the Redmi K90 Ultra or the Sony Xperia XZ2 Compact?
The Redmi K90 Ultra significantly outperforms the Sony Xperia XZ2 Compact by 42 points (73/100 vs 31/100).
What is the rating of the Redmi K90 Ultra and the Sony Xperia XZ2 Compact?
The Redmi K90 Ultra has a MobileRank rating of 73/100, the Sony Xperia XZ2 Compact — 31/100.
Which has the better camera: the Redmi K90 Ultra or the Sony Xperia XZ2 Compact?
The Redmi K90 Ultra leads on camera score (37/100 vs 13/100).
Which is more powerful: the Redmi K90 Ultra or the Sony Xperia XZ2 Compact?
The Redmi K90 Ultra leads on performance (92/100 vs 41/100).
Should you choose the Redmi K90 Ultra over the Sony Xperia XZ2 Compact?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers. The Sony Xperia XZ2 Compact is a better fit for everyday use.