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; launch prices were $420 and $723. By overall MobileRank rating, the Vivo X300s leads — 89/100 vs 73/100 (a 16-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 3,233,695).
Profile comparison
Category scores
Redmi K90 Ultra
Vivo X300s
What makes Redmi K90 Ultra better?
- Bigger battery: 8550 vs 7100 mAh
- Faster charging: 100W vs 90W
- Higher refresh rate: 165Hz vs 144Hz
- Cheaper at launch: $420 vs $723
- Overall rating 73/100
What makes Vivo X300s better?
- Higher AnTuTu: 3703823 vs 3233695
- Better Geekbench Single: 3293 vs 3013
- Better Geekbench Multi: 10243 vs 9287
- Better main camera: 200MP vs 50MP
- Lighter: 217g vs 227g
- Higher performance (95/100 vs 92/100)
- Better camera (94/100 vs 37/100)
- Longer battery life (83/100 vs 78/100)
- Better portability (42/100 vs 40/100)
Comparison verdict
Comparing the Redmi K90 Ultra vs the Vivo X300s, the Vivo X300s scores 16 points higher (89/100 vs 73/100). In the "camera" category, the Vivo X300s leads (94/100 vs 37/100). Value score: Redmi K90 Ultra — 72/100, Vivo X300s — 92/100; 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 X300s and the Redmi K90 Ultra are nearly equal (95/100 vs 92/100). In the "display" category, both devices are on the same level — 94/100. In the "camera" category, the Vivo X300s significantly outperforms the Redmi K90 Ultra (94/100 vs 37/100). In the "battery" category, the Vivo X300s is a bit better (83/100 vs 78/100). In the "portability" category, the Vivo X300s and the Redmi K90 Ultra are nearly equal (42/100 vs 40/100).
Specs comparison
| Specification | Redmi K90 Ultra | Vivo X300s | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Dimensity 9500 | |
| AnTuTu | 3233695 | 3703823 | |
| Geekbench Single | 3013 | 3293 | |
| Geekbench Multi | 9287 | 10243 | |
| 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 | |
| Launch price | $420 | $723 |
Camera comparison
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Vivo X300s
- Main: 200MP f/1.7
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 50MP
Display comparison
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Vivo X300s
- 6.8" LTPO AMOLED
- Resolution: 2800x1260
- Refresh rate: 144 Hz
Battery and charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Vivo X300s
- 7100 mAh
- Wired: 90W
- Wireless: 40W
Overall performance score
We compared Redmi K90 Ultra and Vivo X300s, covering their specs and all relevant benchmarks.
Vivo X300s leads Redmi K90 Ultra by 12.7% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $303. Redmi K90 Ultra was $303 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Vivo X300s and the Redmi K90 Ultra are nearly equal (95/100 vs 92/100).
display
In the "display" category, both devices are on the same level — 94/100.
camera
In the "camera" category, the Vivo X300s significantly outperforms the Redmi K90 Ultra (94/100 vs 37/100).
battery
In the "battery" category, the Vivo X300s is a bit better (83/100 vs 78/100).
portability
In the "portability" category, the Vivo X300s and the Redmi K90 Ultra are nearly equal (42/100 vs 40/100).
Frequently asked questions
Which is better: the Redmi K90 Ultra or the Vivo X300s?
The Vivo X300s is noticeably better than the Redmi K90 Ultra — the overall rating gap is 16 points.
What is the rating of the Redmi K90 Ultra and the Vivo X300s?
The Redmi K90 Ultra has a MobileRank rating of 73/100, the Vivo X300s — 89/100.
Which has the better camera: the Redmi K90 Ultra or the Vivo X300s?
The Vivo X300s leads on camera score (94/100 vs 37/100).
Should you choose the Redmi K90 Ultra over the Vivo X300s?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life. The Vivo X300s is a better fit for gamers and power users, mobile photography enthusiasts, those who care about battery life, budget-conscious buyers.