Redmi K90 Ultra vs Vivo X300s
The Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite, while the Vivo X300s (2026) runs on the Dimensity 9500; estimated prices are $420 and $723. By overall MobileRank rating, the Vivo X300s leads — 82/100 vs 61/100 (a 21-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 7100); the main camera is 50 MP vs 200 MP; the Vivo X300s is faster in AnTuTu (3,703,823 vs 2,760,000).
Redmi K90 Ultra
Vivo X300s
- Bigger battery: 8550 vs 7100 mAh
- Faster charging: 100W vs 90W
- Higher refresh rate: 165Hz vs 144Hz
- Cheaper: $420 vs $723
- Longer battery life (77/100 vs 76/100)
- Better value for money (81/100 vs 60/100)
- Higher AnTuTu: 3703823 vs 2760000
- Better Geekbench Single: 3228 vs 3050
- Better Geekbench Multi: 9553 vs 9300
- Better main camera: 200MP vs 50MP
- Lighter: 217g vs 227g
- Higher performance (80/100 vs 65/100)
- Better camera (94/100 vs 32/100)
- Better design/ergonomics (28/100 vs 16/100)
Comparing the Redmi K90 Ultra vs the Vivo X300s, the Vivo X300s scores 21 points higher (82/100 vs 61/100). In the "performance" category, the Vivo X300s leads (80/100 vs 65/100). In the "camera" category, the Vivo X300s leads (94/100 vs 32/100). In the "value for money" category, the Redmi K90 Ultra leads (81/100 vs 60/100). In the "performance" category, the Vivo X300s notably outperforms the Redmi K90 Ultra (80/100 vs 65/100). In the "display" category, both devices are on the same level — 100/100. In the "camera" category, the Vivo X300s significantly outperforms the Redmi K90 Ultra (94/100 vs 32/100). In the "battery" category, the Redmi K90 Ultra and the Vivo X300s are nearly equal (77/100 vs 76/100). In the "design" category, the Vivo X300s is a bit better (28/100 vs 16/100). In the "value for money" category, the Redmi K90 Ultra notably outperforms the Vivo X300s (81/100 vs 60/100).
| Specification | Redmi K90 Ultra | Vivo X300s | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Dimensity 9500 | |
| AnTuTu | 2760000 | 3703823 | |
| Geekbench Single | 3050 | 3228 | |
| Geekbench Multi | 9300 | 9553 | |
| Display | 6.8" AMOLED | 6.8" LTPO AMOLED | |
| Resolution | 1280x2772 | 2800x1260 | |
| Refresh rate | 165 Hz | 144 Hz | |
| Battery | 8550 mAh | 7100 mAh | |
| Charging | 100W | 90W | |
| Wireless charging | 0W | 40W | |
| Main camera | 50 MP | 200 MP | |
| Ultrawide | 8 MP | 50 MP | |
| Telephoto | 0 MP | 50 MP | |
| Front camera | 20 MP | 50 MP | |
| RAM | 12GB / 16GB | 12GB / 16GB | |
| Storage | 256GB / 512GB | 256GB / 512GB / 1TB | |
| OS | Android 16 | Android 16 / OriginOS 6 | |
| Brightness (peak) | 3500 nits | — | |
| NFC | yes | — | |
| Protection | IP68/IP69 | — | |
| Dimensions | 162.9×77.9×8.2 mm | — | |
| Weight | 227 g | 217 g | |
| Price | $420 | $723 |
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Vivo X300s
- Main: 200MP f/f/1.7
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 50MP
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Vivo X300s
- 6.8" LTPO AMOLED
- Resolution: 2800x1260
- Refresh rate: 144 Hz
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Vivo X300s
- 7100 mAh
- Wired: 90W
- Wireless: 40W
We compared Redmi K90 Ultra and Vivo X300s, covering their specs and all relevant benchmarks.
Vivo X300s leads Redmi K90 Ultra by 25.5% in our overall performance rating.
Price difference: $303. Redmi K90 Ultra is cheaper by $303.
performance
In the "performance" category, the Vivo X300s notably outperforms the Redmi K90 Ultra (80/100 vs 65/100).
display
In the "display" category, both devices are on the same level — 100/100.
camera
In the "camera" category, the Vivo X300s significantly outperforms the Redmi K90 Ultra (94/100 vs 32/100).
battery
In the "battery" category, the Redmi K90 Ultra and the Vivo X300s are nearly equal (77/100 vs 76/100).
design
In the "design" category, the Vivo X300s is a bit better (28/100 vs 16/100).
value for money
In the "value for money" category, the Redmi K90 Ultra notably outperforms the Vivo X300s (81/100 vs 60/100).
Which is better: the Redmi K90 Ultra or the Vivo X300s?
The Vivo X300s significantly outperforms the Redmi K90 Ultra by 21 points (82/100 vs 61/100).
What is the rating of the Redmi K90 Ultra and the Vivo X300s?
The Redmi K90 Ultra has a MobileRank rating of 61/100, the Vivo X300s — 82/100.
Which has the better camera: the Redmi K90 Ultra or the Vivo X300s?
The Vivo X300s leads on camera score (94/100 vs 32/100).
Which is more powerful: the Redmi K90 Ultra or the Vivo X300s?
The Vivo X300s leads on performance (80/100 vs 65/100).
Should you choose the Redmi K90 Ultra over the Vivo X300s?
The Redmi K90 Ultra is a better fit for active users, those who care about battery life, budget-conscious buyers. The Vivo X300s is a better fit for gamers and power users, mobile photography enthusiasts, those who care about battery life.