Redmi K90 Ultra vs Vivo X300 Ultra
The Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite, while the Vivo X300 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite Gen 5; launch prices were $420 and $950. By overall MobileRank rating, the Vivo X300 Ultra leads — 91/100 vs 73/100 (a 18-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 7000); the main camera is 50 MP vs 200 MP; the Vivo X300 Ultra is faster in AnTuTu (4,247,433 vs 3,233,695).
Profile comparison
Category scores
Redmi K90 Ultra
Vivo X300 Ultra
What makes Redmi K90 Ultra better?
- Bigger battery: 8550 vs 7000 mAh
- Higher refresh rate: 165Hz vs 120Hz
- Lighter: 227g vs 230g
- Cheaper at launch: $420 vs $950
- Better display (94/100 vs 89/100)
- Better portability (40/100 vs 39/100)
What makes Vivo X300 Ultra better?
- Higher AnTuTu: 4247433 vs 3233695
- Better Geekbench Single: 3639 vs 3013
- Better Geekbench Multi: 11047 vs 9287
- Better main camera: 200MP vs 50MP
- Higher performance (99/100 vs 92/100)
- Better camera (96/100 vs 37/100)
- Longer battery life (85/100 vs 78/100)
Comparison verdict
Comparing the Redmi K90 Ultra vs the Vivo X300 Ultra, the Vivo X300 Ultra scores 18 points higher (91/100 vs 73/100). In the "camera" category, the Vivo X300 Ultra leads (96/100 vs 37/100). Value score: Redmi K90 Ultra — 72/100, Vivo X300 Ultra — 94/100; it shows how far a model sits above or below the usual level for its price, and is not part of the overall rating. In the "performance" category, the Vivo X300 Ultra is a bit better (99/100 vs 92/100). In the "display" category, the Redmi K90 Ultra is a bit better (94/100 vs 89/100). In the "camera" category, the Vivo X300 Ultra significantly outperforms the Redmi K90 Ultra (96/100 vs 37/100). In the "battery" category, the Vivo X300 Ultra is a bit better (85/100 vs 78/100). In the "portability" category, the Redmi K90 Ultra and the Vivo X300 Ultra are nearly equal (40/100 vs 39/100).
Specs comparison
| Specification | Redmi K90 Ultra | Vivo X300 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | 3233695 | 4247433 | |
| Geekbench Single | 3013 | 3639 | |
| Geekbench Multi | 9287 | 11047 | |
| Display | 6.8" AMOLED | 6.8" LTPO OLED | |
| Resolution | 1280x2772 | 3168x1440 | |
| Refresh rate | 165 Hz | 120 Hz | |
| Battery | 8550 mAh | 7000 mAh | |
| Charging | 100W | 100W | |
| Wireless charging | 0W | 40W | |
| DXOMark (camera) | — | 170 | |
| Main camera | 50 MP | 200 MP | |
| Ultrawide | 8 MP | 50 MP | |
| Telephoto | 0 MP | 200 MP | |
| Front camera | 20 MP | 32 MP | |
| RAM | 12GB / 16GB | 12GB / 16GB | |
| Storage | 256GB / 512GB | 256GB / 512GB / 1TB | |
| OS | Android 16 | Android 16 | |
| Brightness (peak) | 3500 nits | — | |
| NFC | yes | yes | |
| Protection | IP68/IP69 | IP69 | |
| Dimensions | 162.9×77.9×8.2 mm | 163.0×76.8×8.2 mm | |
| Weight | 227 g | 230 g | |
| Launch price | $420 | $950 |
Camera comparison
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Vivo X300 Ultra
- Main: 200MP f/1.6
- Ultrawide: 50MP
- Telephoto: 200MP
- Front: 32MP
Display comparison
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Vivo X300 Ultra
- 6.8" LTPO OLED
- Resolution: 3168x1440
- Refresh rate: 120 Hz
Battery and charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Vivo X300 Ultra
- 7000 mAh
- NanoReview test: web browsing 10:18 hrs, total 29:11 hrs
- Wired: 100W
- Wireless: 40W
Overall performance score
We compared Redmi K90 Ultra and Vivo X300 Ultra, covering their specs and all relevant benchmarks.
Vivo X300 Ultra leads Redmi K90 Ultra by 23.9% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $530. Redmi K90 Ultra was $530 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Vivo X300 Ultra is a bit better (99/100 vs 92/100).
display
In the "display" category, the Redmi K90 Ultra is a bit better (94/100 vs 89/100).
camera
In the "camera" category, the Vivo X300 Ultra significantly outperforms the Redmi K90 Ultra (96/100 vs 37/100).
battery
In the "battery" category, the Vivo X300 Ultra is a bit better (85/100 vs 78/100).
portability
In the "portability" category, the Redmi K90 Ultra and the Vivo X300 Ultra are nearly equal (40/100 vs 39/100).
Frequently asked questions
Which is better: the Redmi K90 Ultra or the Vivo X300 Ultra?
The Vivo X300 Ultra is noticeably better than the Redmi K90 Ultra — the overall rating gap is 18 points.
What is the rating of the Redmi K90 Ultra and the Vivo X300 Ultra?
The Redmi K90 Ultra has a MobileRank rating of 73/100, the Vivo X300 Ultra — 91/100.
Which has the better camera: the Redmi K90 Ultra or the Vivo X300 Ultra?
The Vivo X300 Ultra leads on camera score (96/100 vs 37/100).
Which is more powerful: the Redmi K90 Ultra or the Vivo X300 Ultra?
The Vivo X300 Ultra leads on performance (99/100 vs 92/100).
Should you choose the Redmi K90 Ultra over the Vivo X300 Ultra?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life. The Vivo X300 Ultra is a better fit for gamers and power users, mobile photography enthusiasts, those who care about battery life, budget-conscious buyers.