Redmi K90 Ultra vs Samsung Galaxy S8
The Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite, while the Samsung Galaxy S8 (2017) runs on the Samsung Exynos 8895; launch prices were $420 and $720. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 28/100 (a 45-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 3000); the main camera is 50 MP vs 12 MP; the Redmi K90 Ultra is faster in AnTuTu (3,119,308 vs 437,463); the Samsung Galaxy S8 is noticeably lighter (155g vs 227g).
Redmi K90 Ultra
Samsung Galaxy S8
- Higher AnTuTu: 3119308 vs 437463
- Better Geekbench Single: 3041 vs 419
- Better Geekbench Multi: 9494 vs 1445
- Bigger battery: 8550 vs 3000 mAh
- Better main camera: 50MP vs 12MP
- Higher refresh rate: 165Hz vs 60Hz
- Cheaper at launch: $420 vs $720
- Higher performance (92/100 vs 32/100)
- Better camera (37/100 vs 10/100)
- Longer battery life (78/100 vs 15/100)
- Better display (94/100 vs 51/100)
- Lighter: 155g vs 227g
- Better portability (82/100 vs 40/100)
Comparing the Redmi K90 Ultra vs the Samsung Galaxy S8, the Redmi K90 Ultra scores 45 points higher (73/100 vs 28/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 32/100). In the "camera" category, the Redmi K90 Ultra leads (37/100 vs 10/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 15/100). Value score: Redmi K90 Ultra — 82/100, Samsung Galaxy S8 — 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 Samsung Galaxy S8 (92/100 vs 32/100). In the "display" category, the Redmi K90 Ultra significantly outperforms the Samsung Galaxy S8 (94/100 vs 51/100). In the "camera" category, the Redmi K90 Ultra notably outperforms the Samsung Galaxy S8 (37/100 vs 10/100). In the "battery" category, the Redmi K90 Ultra significantly outperforms the Samsung Galaxy S8 (78/100 vs 15/100). In the "portability" category, the Samsung Galaxy S8 significantly outperforms the Redmi K90 Ultra (82/100 vs 40/100).
| Specification | Redmi K90 Ultra | Samsung Galaxy S8 | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Samsung Exynos 8895 | |
| AnTuTu | 3119308 | 437463 | |
| Geekbench Single | 3041 | 419 | |
| Geekbench Multi | 9494 | 1445 | |
| Display | 6.8" AMOLED | 5.8" AMOLED | |
| Resolution | 1280x2772 | — | |
| Refresh rate | 165 Hz | 60 Hz | |
| Battery | 8550 mAh | 3000 mAh | |
| Charging | 100W | — | |
| Main camera | 50 MP | 12 MP | |
| Ultrawide | 8 MP | 0 MP | |
| Front camera | 20 MP | 8 MP | |
| RAM | 12GB / 16GB | 4GB | |
| Storage | 256GB / 512GB | 64GB | |
| OS | Android 16 | — | |
| Brightness (peak) | 3500 nits | — | |
| NFC | yes | yes | |
| Protection | IP68/IP69 | IP68 | |
| Dimensions | 162.9×77.9×8.2 mm | 159.5×73.4×8.1 mm | |
| Weight | 227 g | 155 g | |
| Launch price | $420 | $720 |
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Samsung Galaxy S8
- Main: 12MP
- Front: 8MP
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Samsung Galaxy S8
- 5.8" AMOLED
- Refresh rate: 60 Hz
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Samsung Galaxy S8
- 3000 mAh
- Wireless: supported, wattage unknown
We compared Redmi K90 Ultra and Samsung Galaxy S8, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Samsung Galaxy S8 by 613.0% in our overall performance rating.
Launch price difference: $300. Redmi K90 Ultra was $300 cheaper at launch.
performance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the Samsung Galaxy S8 (92/100 vs 32/100).
display
In the "display" category, the Redmi K90 Ultra significantly outperforms the Samsung Galaxy S8 (94/100 vs 51/100).
camera
In the "camera" category, the Redmi K90 Ultra notably outperforms the Samsung Galaxy S8 (37/100 vs 10/100).
battery
In the "battery" category, the Redmi K90 Ultra significantly outperforms the Samsung Galaxy S8 (78/100 vs 15/100).
portability
In the "portability" category, the Samsung Galaxy S8 significantly outperforms the Redmi K90 Ultra (82/100 vs 40/100).
Which is better: the Redmi K90 Ultra or the Samsung Galaxy S8?
The Redmi K90 Ultra significantly outperforms the Samsung Galaxy S8 by 45 points (73/100 vs 28/100).
What is the rating of the Redmi K90 Ultra and the Samsung Galaxy S8?
The Redmi K90 Ultra has a MobileRank rating of 73/100, the Samsung Galaxy S8 — 28/100.
Which has the better camera: the Redmi K90 Ultra or the Samsung Galaxy S8?
The Redmi K90 Ultra leads on camera score (37/100 vs 10/100).
Which is more powerful: the Redmi K90 Ultra or the Samsung Galaxy S8?
The Redmi K90 Ultra leads on performance (92/100 vs 32/100).
Should you choose the Redmi K90 Ultra over the Samsung Galaxy S8?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers. The Samsung Galaxy S8 is a better fit for everyday use.