Redmi K90 Ultra vs Vivo iQOO 15 Ultra
The Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite, while the Vivo iQOO 15 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite Gen 5; launch prices were $420 and $799. By overall MobileRank rating, the Vivo iQOO 15 Ultra leads — 89/100 vs 73/100 (a 16-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 7400); the Vivo iQOO 15 Ultra is faster in AnTuTu (4,602,290 vs 3,233,695).
Profile comparison
Category scores
Redmi K90 Ultra
Vivo iQOO 15 Ultra
What makes Redmi K90 Ultra better?
- Bigger battery: 8550 vs 7400 mAh
- Higher refresh rate: 165Hz vs 144Hz
- Cheaper at launch: $420 vs $799
- Better portability (40/100 vs 35/100)
What makes Vivo iQOO 15 Ultra better?
- Higher AnTuTu: 4602290 vs 3233695
- Better Geekbench Single: 3639 vs 3013
- Better Geekbench Multi: 11047 vs 9287
- Faster charging: 120W vs 100W
- Higher performance (99/100 vs 92/100)
- Better camera (78/100 vs 37/100)
- Longer battery life (92/100 vs 78/100)
- Better display (99/100 vs 94/100)
Comparison verdict
Comparing the Redmi K90 Ultra vs the Vivo iQOO 15 Ultra, the Vivo iQOO 15 Ultra scores 16 points higher (89/100 vs 73/100). In the "camera" category, the Vivo iQOO 15 Ultra leads (78/100 vs 37/100). In the "battery" category, the Vivo iQOO 15 Ultra leads (92/100 vs 78/100). Value score: Redmi K90 Ultra — 72/100, Vivo iQOO 15 Ultra — 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 iQOO 15 Ultra is a bit better (99/100 vs 92/100). In the "display" category, the Vivo iQOO 15 Ultra is a bit better (99/100 vs 94/100). In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Redmi K90 Ultra (78/100 vs 37/100). In the "battery" category, the Vivo iQOO 15 Ultra is a bit better (92/100 vs 78/100). In the "portability" category, the Redmi K90 Ultra is a bit better (40/100 vs 35/100).
Specs comparison
| Specification | Redmi K90 Ultra | Vivo iQOO 15 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | 3233695 | 4602290 | |
| Geekbench Single | 3013 | 3639 | |
| Geekbench Multi | 9287 | 11047 | |
| Display | 6.8" AMOLED | 6.8" LTPO AMOLED | |
| Resolution | 1280x2772 | 1440x3168 | |
| Refresh rate | 165 Hz | 144 Hz | |
| Battery | 8550 mAh | 7400 mAh | |
| Charging | 100W | 120W | |
| Wireless charging | 0W | 50W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 8 MP | 50 MP | |
| Telephoto | 0 MP | 50 MP | |
| Front camera | 20 MP | 32 MP | |
| RAM | 12GB / 16GB | 12GB / 16GB / 24GB | |
| Storage | 256GB / 512GB | 256GB / 512GB / 1TB | |
| OS | Android 16 | Android 16 | |
| Brightness (peak) | 3500 nits | 8000 nits | |
| NFC | yes | yes | |
| Protection | IP68/IP69 | IP68 | |
| Dimensions | 162.9×77.9×8.2 mm | 163.7×76.8×8.7 mm | |
| Weight | 227 g | 227 g | |
| Launch price | $420 | $799 |
Camera comparison
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Vivo iQOO 15 Ultra
- Main: 50MP f/1.9
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Display comparison
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Vivo iQOO 15 Ultra
- 6.8" LTPO AMOLED
- Resolution: 1440x3168
- Refresh rate: 144 Hz
Battery and charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Vivo iQOO 15 Ultra
- 7400 mAh
- Wired: 120W
- Wireless: 50W
Overall performance score
We compared Redmi K90 Ultra and Vivo iQOO 15 Ultra, covering their specs and all relevant benchmarks.
Vivo iQOO 15 Ultra leads Redmi K90 Ultra by 29.7% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $379. Redmi K90 Ultra was $379 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Vivo iQOO 15 Ultra is a bit better (99/100 vs 92/100).
display
In the "display" category, the Vivo iQOO 15 Ultra is a bit better (99/100 vs 94/100).
camera
In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Redmi K90 Ultra (78/100 vs 37/100).
battery
In the "battery" category, the Vivo iQOO 15 Ultra is a bit better (92/100 vs 78/100).
portability
In the "portability" category, the Redmi K90 Ultra is a bit better (40/100 vs 35/100).
Frequently asked questions
Which is better: the Redmi K90 Ultra or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra 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 iQOO 15 Ultra?
The Redmi K90 Ultra has a MobileRank rating of 73/100, the Vivo iQOO 15 Ultra — 89/100.
Which has the better camera: the Redmi K90 Ultra or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra leads on camera score (78/100 vs 37/100).
Which is more powerful: the Redmi K90 Ultra or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra leads on performance (99/100 vs 92/100).
Should you choose the Redmi K90 Ultra over the Vivo iQOO 15 Ultra?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life. The Vivo iQOO 15 Ultra is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers.