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; estimated prices are $555 and $420. By overall MobileRank rating, the OnePlus Ace 6 Ultra leads — 66/100 vs 61/100 (a 5-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 2,760,000).
OnePlus Ace 6 Ultra
Redmi K90 Ultra
- Higher AnTuTu: 3429868 vs 2760000
- Better Geekbench Single: 3228 vs 3050
- Better Geekbench Multi: 9553 vs 9300
- Bigger battery: 8600 vs 8550 mAh
- Faster charging: 120W vs 100W
- Lighter: 217g vs 227g
- Higher performance (76/100 vs 65/100)
- Longer battery life (82/100 vs 77/100)
- Better design/ergonomics (28/100 vs 16/100)
- Cheaper: $420 vs $555
- Better camera (32/100 vs 31/100)
- Better value for money (81/100 vs 72/100)
Comparing the OnePlus Ace 6 Ultra vs the Redmi K90 Ultra, the OnePlus Ace 6 Ultra scores 5 points higher (66/100 vs 61/100). In the "performance" category, the OnePlus Ace 6 Ultra leads (76/100 vs 65/100). In the "performance" category, the OnePlus Ace 6 Ultra is a bit better (76/100 vs 65/100). In the "display" category, both devices are on the same level — 100/100. In the "camera" category, the Redmi K90 Ultra and the OnePlus Ace 6 Ultra are nearly equal (32/100 vs 31/100). In the "battery" category, the OnePlus Ace 6 Ultra is a bit better (82/100 vs 77/100). In the "design" category, the OnePlus Ace 6 Ultra is a bit better (28/100 vs 16/100). In the "value for money" category, the Redmi K90 Ultra is a bit better (81/100 vs 72/100).
| Specification | OnePlus Ace 6 Ultra | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | MediaTek Dimensity 9500 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 3429868 | 2760000 | |
| Geekbench Single | 3228 | 3050 | |
| Geekbench Multi | 9553 | 9300 | |
| 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 | |
| Price | $555 | $420 |
OnePlus Ace 6 Ultra
- Main: 50MP f/f/1.8
- Ultrawide: 8MP
- Front: 16MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
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
OnePlus Ace 6 Ultra
- 8600 mAh
- Wired: 120W
- No wireless charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
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 24.3% in our overall performance rating.
Price difference: $135. Redmi K90 Ultra is cheaper by $135.
performance
In the "performance" category, the OnePlus Ace 6 Ultra is a bit better (76/100 vs 65/100).
display
In the "display" category, both devices are on the same level — 100/100.
camera
In the "camera" category, the Redmi K90 Ultra and the OnePlus Ace 6 Ultra are nearly equal (32/100 vs 31/100).
battery
In the "battery" category, the OnePlus Ace 6 Ultra is a bit better (82/100 vs 77/100).
design
In the "design" category, the OnePlus Ace 6 Ultra is a bit better (28/100 vs 16/100).
value for money
In the "value for money" category, the Redmi K90 Ultra is a bit better (81/100 vs 72/100).
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 5 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 66/100, the Redmi K90 Ultra — 61/100.
Which is more powerful: the OnePlus Ace 6 Ultra or the Redmi K90 Ultra?
The OnePlus Ace 6 Ultra leads on performance (76/100 vs 65/100).
Should you choose the OnePlus Ace 6 Ultra over the Redmi K90 Ultra?
The OnePlus Ace 6 Ultra is a better fit for active users, those who care about battery life. The Redmi K90 Ultra is a better fit for active users, those who care about battery life, budget-conscious buyers.