OnePlus Ace 6 Ultra vs Redmi K90 Ultra
The OnePlus Ace 6 Ultra (2026) runs on the MediaTek Dimensity 9500, while the Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $555 and $420. By overall MobileRank rating, the OnePlus Ace 6 Ultra leads — 74/100 vs 73/100 (a 1-point difference). Key differences: the OnePlus Ace 6 Ultra has the bigger battery (8600 mAh vs 8550); the OnePlus Ace 6 Ultra is faster in AnTuTu (3,429,868 vs 3,233,695).
Profile comparison
Category scores
OnePlus Ace 6 Ultra
Redmi K90 Ultra
What makes OnePlus Ace 6 Ultra better?
- Higher AnTuTu: 3429868 vs 3233695
- Better Geekbench Single: 3293 vs 3013
- Better Geekbench Multi: 10243 vs 9287
- Bigger battery: 8600 vs 8550 mAh
- Faster charging: 120W vs 100W
- Lighter: 217g vs 227g
- Higher performance (94/100 vs 92/100)
- Longer battery life (82/100 vs 78/100)
- Better portability (43/100 vs 40/100)
What makes Redmi K90 Ultra better?
- Cheaper at launch: $420 vs $555
- Better camera (37/100 vs 35/100)
Comparison verdict
Comparing the OnePlus Ace 6 Ultra vs the Redmi K90 Ultra, the OnePlus Ace 6 Ultra scores 1 points higher (74/100 vs 73/100). Value score: OnePlus Ace 6 Ultra — 66/100, Redmi K90 Ultra — 72/100; 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 OnePlus Ace 6 Ultra and the Redmi K90 Ultra are nearly equal (94/100 vs 92/100). In the "display" category, both devices are on the same level — 94/100. In the "camera" category, the Redmi K90 Ultra and the OnePlus Ace 6 Ultra are nearly equal (37/100 vs 35/100). In the "battery" category, the OnePlus Ace 6 Ultra and the Redmi K90 Ultra are nearly equal (82/100 vs 78/100). In the "portability" category, the OnePlus Ace 6 Ultra and the Redmi K90 Ultra are nearly equal (43/100 vs 40/100).
Specs comparison
| Specification | OnePlus Ace 6 Ultra | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | MediaTek Dimensity 9500 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 3429868 | 3233695 | |
| Geekbench Single | 3293 | 3013 | |
| Geekbench Multi | 10243 | 9287 | |
| Display | 6.8" AMOLED | 6.8" AMOLED | |
| Resolution | 1272x2772 | 1280x2772 | |
| Refresh rate | 165 Hz | 165 Hz | |
| Battery | 8600 mAh | 8550 mAh | |
| Charging | 120W | 100W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 8 MP | 8 MP | |
| Front camera | 16 MP | 20 MP | |
| RAM | 12GB / 16GB | 12GB / 16GB | |
| Storage | 256GB / 512GB / 1TB | 256GB / 512GB | |
| OS | Android 16 | Android 16 | |
| Brightness (peak) | 1800 nits | 3500 nits | |
| NFC | yes | yes | |
| Protection | IP66 | IP68/IP69 | |
| Dimensions | 162.5×77.5×8.5 mm | 162.9×77.9×8.2 mm | |
| Weight | 217 g | 227 g | |
| Launch price | $555 | $420 |
Camera comparison
OnePlus Ace 6 Ultra
- Main: 50MP f/1.8
- Ultrawide: 8MP
- Front: 16MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Display comparison
OnePlus Ace 6 Ultra
- 6.8" AMOLED
- Resolution: 1272x2772
- Refresh rate: 165 Hz
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Battery and charging
OnePlus Ace 6 Ultra
- 8600 mAh
- Wired: 120W
- No wireless charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Overall performance score
We compared OnePlus Ace 6 Ultra and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
OnePlus Ace 6 Ultra leads Redmi K90 Ultra by 6.1% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $135. Redmi K90 Ultra was $135 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the OnePlus Ace 6 Ultra and the Redmi K90 Ultra are nearly equal (94/100 vs 92/100).
display
In the "display" category, both devices are on the same level — 94/100.
camera
In the "camera" category, the Redmi K90 Ultra and the OnePlus Ace 6 Ultra are nearly equal (37/100 vs 35/100).
battery
In the "battery" category, the OnePlus Ace 6 Ultra and the Redmi K90 Ultra are nearly equal (82/100 vs 78/100).
portability
In the "portability" category, the OnePlus Ace 6 Ultra and the Redmi K90 Ultra are nearly equal (43/100 vs 40/100).
Frequently asked questions
Which is better: the OnePlus Ace 6 Ultra or the Redmi K90 Ultra?
The OnePlus Ace 6 Ultra edges out the Redmi K90 Ultra by just 1 points — the two devices are very close in overall level.
What is the rating of the OnePlus Ace 6 Ultra and the Redmi K90 Ultra?
The OnePlus Ace 6 Ultra has a MobileRank rating of 74/100, the Redmi K90 Ultra — 73/100.
Should you choose the OnePlus Ace 6 Ultra over the Redmi K90 Ultra?
The OnePlus Ace 6 Ultra is a better fit for gamers and power users, those who care about battery life. The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life.