OnePlus Ace 6 Ultra vs Redmi K20 Pro Premium
The OnePlus Ace 6 Ultra (2026) runs on the MediaTek Dimensity 9500, while the Redmi K20 Pro Premium (2019) runs on the Qualcomm Snapdragon 855+. By overall MobileRank rating, the OnePlus Ace 6 Ultra leads — 66/100 vs 17/100 (a 49-point difference). Key differences: the OnePlus Ace 6 Ultra has the bigger battery (8600 mAh vs 4000); the main camera is 50 MP vs 48 MP; the OnePlus Ace 6 Ultra is faster in AnTuTu (3,429,868 vs 859,084); the Redmi K20 Pro Premium is noticeably lighter (191g vs 217g).
OnePlus Ace 6 Ultra
Redmi K20 Pro Premium
- Higher AnTuTu: 3429868 vs 859084
- Better Geekbench Single: 3228 vs 1031
- Better Geekbench Multi: 9553 vs 2864
- Bigger battery: 8600 vs 4000 mAh
- Faster charging: 120W vs 27W
- Better main camera: 50MP vs 48MP
- Higher performance (76/100 vs 2/100)
- Longer battery life (82/100 vs 13/100)
- Better display (100/100 vs 0/100)
- Better value for money (72/100 vs 55/100)
- Lighter: 191g vs 217g
- Better camera (36/100 vs 31/100)
- Better design/ergonomics (61/100 vs 28/100)
Comparing the OnePlus Ace 6 Ultra vs the Redmi K20 Pro Premium, the OnePlus Ace 6 Ultra scores 49 points higher (66/100 vs 17/100). In the "performance" category, the OnePlus Ace 6 Ultra leads (76/100 vs 2/100). In the "battery" category, the OnePlus Ace 6 Ultra leads (82/100 vs 13/100). In the "value for money" category, the OnePlus Ace 6 Ultra leads (72/100 vs 55/100). In the "performance" category, the OnePlus Ace 6 Ultra significantly outperforms the Redmi K20 Pro Premium (76/100 vs 2/100). In the "display" category, the OnePlus Ace 6 Ultra significantly outperforms the Redmi K20 Pro Premium (100/100 vs 0/100). In the "camera" category, the Redmi K20 Pro Premium is a bit better (36/100 vs 31/100). In the "battery" category, the OnePlus Ace 6 Ultra significantly outperforms the Redmi K20 Pro Premium (82/100 vs 13/100). In the "design" category, the Redmi K20 Pro Premium significantly outperforms the OnePlus Ace 6 Ultra (61/100 vs 28/100). In the "value for money" category, the OnePlus Ace 6 Ultra notably outperforms the Redmi K20 Pro Premium (72/100 vs 55/100).
| Specification | OnePlus Ace 6 Ultra | Redmi K20 Pro Premium | |
|---|---|---|---|
| Processor | MediaTek Dimensity 9500 | Qualcomm Snapdragon 855+ | |
| AnTuTu | 3429868 | 859084 | |
| Geekbench Single | 3228 | 1031 | |
| Geekbench Multi | 9553 | 2864 | |
| Display | 6.8" AMOLED | 6.4" Super AMOLED | |
| Resolution | 1272x2772 | 1080x2340 | |
| Refresh rate | 165 Hz | — | |
| Battery | 8600 mAh | 4000 mAh | |
| Charging | 120W | 27W | |
| Main camera | 50 MP | 48 MP | |
| Ultrawide | 8 MP | 13 MP | |
| Telephoto | 0 MP | 8 MP | |
| Front camera | 16 MP | 20 MP | |
| RAM | 12GB / 16GB | 8GB / 12GB | |
| Storage | 256GB / 512GB / 1TB | 128GB / 512GB | |
| OS | Android 16 | Android 10; MIUI 11 | |
| Brightness (peak) | 1800 nits | — | |
| NFC | yes | yes | |
| Protection | IP66 | — | |
| Dimensions | 162.5×77.5×8.5 mm | 156.7×74.3×8.8 mm | |
| Weight | 217 g | 191 g | |
| Price | $555 | — |
OnePlus Ace 6 Ultra
- Main: 50MP f/f/1.8
- Ultrawide: 8MP
- Front: 16MP
Redmi K20 Pro Premium
- Main: 48MP f/f/1.8
- Ultrawide: 13MP
- Telephoto: 8MP
- Front: 20MP
OnePlus Ace 6 Ultra
- 6.8" AMOLED
- Resolution: 1272x2772
- Refresh rate: 165 Hz
Redmi K20 Pro Premium
- 6.4" Super AMOLED
- Resolution: 1080x2340
- Refresh rate: —
OnePlus Ace 6 Ultra
- 8600 mAh
- Wired: 120W
- No wireless charging
Redmi K20 Pro Premium
- 4000 mAh
- Wired: 27W
- No wireless charging
We compared OnePlus Ace 6 Ultra and Redmi K20 Pro Premium, covering their specs and all relevant benchmarks.
OnePlus Ace 6 Ultra leads Redmi K20 Pro Premium by 299.2% in our overall performance rating.
Redmi K20 Pro Premium
Price unknownperformance
In the "performance" category, the OnePlus Ace 6 Ultra significantly outperforms the Redmi K20 Pro Premium (76/100 vs 2/100).
display
In the "display" category, the OnePlus Ace 6 Ultra significantly outperforms the Redmi K20 Pro Premium (100/100 vs 0/100).
camera
In the "camera" category, the Redmi K20 Pro Premium is a bit better (36/100 vs 31/100).
battery
In the "battery" category, the OnePlus Ace 6 Ultra significantly outperforms the Redmi K20 Pro Premium (82/100 vs 13/100).
design
In the "design" category, the Redmi K20 Pro Premium significantly outperforms the OnePlus Ace 6 Ultra (61/100 vs 28/100).
value for money
In the "value for money" category, the OnePlus Ace 6 Ultra notably outperforms the Redmi K20 Pro Premium (72/100 vs 55/100).
Which is better: the OnePlus Ace 6 Ultra or the Redmi K20 Pro Premium?
The OnePlus Ace 6 Ultra significantly outperforms the Redmi K20 Pro Premium by 49 points (66/100 vs 17/100).
What is the rating of the OnePlus Ace 6 Ultra and the Redmi K20 Pro Premium?
The OnePlus Ace 6 Ultra has a MobileRank rating of 66/100, the Redmi K20 Pro Premium — 17/100.
Which has the better camera: the OnePlus Ace 6 Ultra or the Redmi K20 Pro Premium?
The Redmi K20 Pro Premium leads on camera score (36/100 vs 31/100).
Which is more powerful: the OnePlus Ace 6 Ultra or the Redmi K20 Pro Premium?
The OnePlus Ace 6 Ultra leads on performance (76/100 vs 2/100).
Should you choose the OnePlus Ace 6 Ultra over the Redmi K20 Pro Premium?
The OnePlus Ace 6 Ultra is a better fit for active users, those who care about battery life. The Redmi K20 Pro Premium is a better fit for everyday use.