Redmi K90 Ultra vs Vivo X100s
The Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite, while the Vivo X100s (2024) runs on the MediaTek Dimensity 9300+; estimated prices are $420 and $699. By overall MobileRank rating, the Vivo X100s leads — 63/100 vs 61/100 (a 2-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 5100); the Redmi K90 Ultra is faster in AnTuTu (2,760,000 vs 2,351,914); the Vivo X100s is noticeably lighter (203g vs 227g).
Redmi K90 Ultra
Vivo X100s
- Higher AnTuTu: 2760000 vs 2351914
- Better Geekbench Single: 3050 vs 2250
- Better Geekbench Multi: 9300 vs 7315
- Bigger battery: 8550 vs 5100 mAh
- Higher refresh rate: 165Hz vs 120Hz
- Cheaper: $420 vs $699
- Higher performance (65/100 vs 46/100)
- Longer battery life (77/100 vs 59/100)
- Better value for money (81/100 vs 62/100)
- Lighter: 203g vs 227g
- Better camera (80/100 vs 32/100)
- Better design/ergonomics (46/100 vs 16/100)
Comparing the Redmi K90 Ultra vs the Vivo X100s, the Vivo X100s scores 2 points higher (63/100 vs 61/100). In the "performance" category, the Redmi K90 Ultra leads (65/100 vs 46/100). In the "camera" category, the Vivo X100s leads (80/100 vs 32/100). In the "battery" category, the Redmi K90 Ultra leads (77/100 vs 59/100). In the "value for money" category, the Redmi K90 Ultra leads (81/100 vs 62/100). In the "performance" category, the Redmi K90 Ultra notably outperforms the Vivo X100s (65/100 vs 46/100). In the "display" category, both devices are on the same level — 100/100. In the "camera" category, the Vivo X100s significantly outperforms the Redmi K90 Ultra (80/100 vs 32/100). In the "battery" category, the Redmi K90 Ultra notably outperforms the Vivo X100s (77/100 vs 59/100). In the "design" category, the Vivo X100s significantly outperforms the Redmi K90 Ultra (46/100 vs 16/100). In the "value for money" category, the Redmi K90 Ultra notably outperforms the Vivo X100s (81/100 vs 62/100).
| Specification | Redmi K90 Ultra | Vivo X100s | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | MediaTek Dimensity 9300+ | |
| AnTuTu | 2760000 | 2351914 | |
| Geekbench Single | 3050 | 2250 | |
| Geekbench Multi | 9300 | 7315 | |
| Display | 6.8" AMOLED | 6.8" LTPO AMOLED | |
| Resolution | 1280x2772 | 1260x2800 | |
| Refresh rate | 165 Hz | 120 Hz | |
| Battery | 8550 mAh | 5100 mAh | |
| Charging | 100W | 100W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 8 MP | 50 MP | |
| Telephoto | 0 MP | 64 MP | |
| Front camera | 20 MP | 32 MP | |
| RAM | 12GB / 16GB | 12GB / 16GB | |
| Storage | 256GB / 512GB | 256GB / 512GB / 1TB | |
| OS | Android 16 | Android 14, OriginOS 4 | |
| Brightness (peak) | 3500 nits | 3000 nits | |
| NFC | yes | yes | |
| Protection | IP68/IP69 | IP68 | |
| Dimensions | 162.9×77.9×8.2 mm | 163.1×75.8×7.8 mm | |
| Weight | 227 g | 203 g | |
| Price | $420 | $699 |
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Vivo X100s
- Main: 50MP f/f/1.6
- Ultrawide: 50MP
- Telephoto: 64MP
- Front: 32MP
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Vivo X100s
- 6.8" LTPO AMOLED
- Resolution: 1260x2800
- Refresh rate: 120 Hz
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Vivo X100s
- 5100 mAh
- Wired: 100W
- No wireless charging
We compared Redmi K90 Ultra and Vivo X100s, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Vivo X100s by 17.4% in our overall performance rating.
Price difference: $279. Redmi K90 Ultra is cheaper by $279.
performance
In the "performance" category, the Redmi K90 Ultra notably outperforms the Vivo X100s (65/100 vs 46/100).
display
In the "display" category, both devices are on the same level — 100/100.
camera
In the "camera" category, the Vivo X100s significantly outperforms the Redmi K90 Ultra (80/100 vs 32/100).
battery
In the "battery" category, the Redmi K90 Ultra notably outperforms the Vivo X100s (77/100 vs 59/100).
design
In the "design" category, the Vivo X100s significantly outperforms the Redmi K90 Ultra (46/100 vs 16/100).
value for money
In the "value for money" category, the Redmi K90 Ultra notably outperforms the Vivo X100s (81/100 vs 62/100).
Which is better: the Redmi K90 Ultra or the Vivo X100s?
The Vivo X100s edges out the Redmi K90 Ultra by just 2 points — the two devices are very close in overall level.
What is the rating of the Redmi K90 Ultra and the Vivo X100s?
The Redmi K90 Ultra has a MobileRank rating of 61/100, the Vivo X100s — 63/100.
Which has the better camera: the Redmi K90 Ultra or the Vivo X100s?
The Vivo X100s leads on camera score (80/100 vs 32/100).
Which is more powerful: the Redmi K90 Ultra or the Vivo X100s?
The Redmi K90 Ultra leads on performance (65/100 vs 46/100).
Should you choose the Redmi K90 Ultra over the Vivo X100s?
The Redmi K90 Ultra is a better fit for active users, those who care about battery life, budget-conscious buyers. The Vivo X100s is a better fit for mobile photography enthusiasts.