OnePlus Ace 6 vs Redmi K40
The OnePlus Ace 6 (2025) runs on the Qualcomm Snapdragon 8 Elite, while the Redmi K40 (2021) runs on the Qualcomm Snapdragon 870; launch prices were $399 and $309. By overall MobileRank rating, the OnePlus Ace 6 leads — 73/100 vs 54/100 (a 19-point difference). Key differences: the OnePlus Ace 6 has the bigger battery (7800 mAh vs 4520); the main camera is 50 MP vs 48 MP; the OnePlus Ace 6 is faster in AnTuTu (3,332,530 vs 1,010,069); the Redmi K40 is noticeably lighter (196g vs 213g).
Profile comparison
Category scores
OnePlus Ace 6
Redmi K40
What makes OnePlus Ace 6 better?
- Higher AnTuTu: 3332530 vs 1010069
- Better Geekbench Single: 3013 vs 1298
- Better Geekbench Multi: 9287 vs 3520
- Bigger battery: 7800 vs 4520 mAh
- Faster charging: 120W vs 33W
- Better main camera: 50MP vs 48MP
- Higher refresh rate: 165Hz vs 120Hz
- Higher performance (92/100 vs 61/100)
- Longer battery life (79/100 vs 42/100)
- Better display (94/100 vs 79/100)
What makes Redmi K40 better?
- Lighter: 196g vs 213g
- Cheaper at launch: $309 vs $399
- Better camera (36/100 vs 35/100)
- Better portability (64/100 vs 48/100)
Comparison verdict
Comparing the OnePlus Ace 6 vs the Redmi K40, the OnePlus Ace 6 scores 19 points higher (73/100 vs 54/100). In the "performance" category, the OnePlus Ace 6 leads (92/100 vs 61/100). In the "battery" category, the OnePlus Ace 6 leads (79/100 vs 42/100). Value score: OnePlus Ace 6 — 74/100, Redmi K40 — 46/100; 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 significantly outperforms the Redmi K40 (92/100 vs 61/100). In the "display" category, the OnePlus Ace 6 notably outperforms the Redmi K40 (94/100 vs 79/100). In the "camera" category, the Redmi K40 and the OnePlus Ace 6 are nearly equal (36/100 vs 35/100). In the "battery" category, the OnePlus Ace 6 significantly outperforms the Redmi K40 (79/100 vs 42/100). In the "portability" category, the Redmi K40 notably outperforms the OnePlus Ace 6 (64/100 vs 48/100).
Specs comparison
| Specification | OnePlus Ace 6 | Redmi K40 | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Qualcomm Snapdragon 870 | |
| AnTuTu | 3332530 | 1010069 | |
| Geekbench Single | 3013 | 1298 | |
| Geekbench Multi | 9287 | 3520 | |
| Display | 6.8" OLED | 6.7" AMOLED | |
| Resolution | 2800x1272 | 2400x1080 | |
| Refresh rate | 165 Hz | 120 Hz | |
| Battery | 7800 mAh | 4520 mAh | |
| Charging | 120W | 33W | |
| Main camera | 50 MP | 48 MP | |
| Ultrawide | 8 MP | 8 MP | |
| Front camera | 16 MP | 20 MP | |
| RAM | 12GB / 16GB | 6GB / 8GB / 12GB | |
| Storage | 256GB / 512GB / 1TB | 128GB / 256GB | |
| OS | Android 15 | Android 11 | |
| Brightness (peak) | 1800 nits | 1300 nits | |
| NFC | yes | yes | |
| Protection | IP68 | — | |
| Dimensions | 163.4×77.0×8.3 mm | 163.7×76.4×7.8 mm | |
| Weight | 213 g | 196 g | |
| Launch price | $399 | $309 |
Camera comparison
OnePlus Ace 6
- Main: 50MP f/1.8
- Ultrawide: 8MP
- Front: 16MP
Redmi K40
- Main: 48MP f/1.79
- Ultrawide: 8MP
- Front: 20MP
Display comparison
OnePlus Ace 6
- 6.8" OLED
- Resolution: 2800x1272
- Refresh rate: 165 Hz
Redmi K40
- 6.7" AMOLED
- Resolution: 2400x1080
- Refresh rate: 120 Hz
Battery and charging
OnePlus Ace 6
- 7800 mAh
- Wired: 120W
- No wireless charging
Redmi K40
- 4520 mAh
- Wired: 33W
- Wireless charging: no data
Overall performance score
We compared OnePlus Ace 6 and Redmi K40, covering their specs and all relevant benchmarks.
OnePlus Ace 6 leads Redmi K40 by 229.9% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $90. Redmi K40 was $90 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the OnePlus Ace 6 significantly outperforms the Redmi K40 (92/100 vs 61/100).
display
In the "display" category, the OnePlus Ace 6 notably outperforms the Redmi K40 (94/100 vs 79/100).
camera
In the "camera" category, the Redmi K40 and the OnePlus Ace 6 are nearly equal (36/100 vs 35/100).
battery
In the "battery" category, the OnePlus Ace 6 significantly outperforms the Redmi K40 (79/100 vs 42/100).
portability
In the "portability" category, the Redmi K40 notably outperforms the OnePlus Ace 6 (64/100 vs 48/100).
Frequently asked questions
Which is better: the OnePlus Ace 6 or the Redmi K40?
The OnePlus Ace 6 is noticeably better than the Redmi K40 — the overall rating gap is 19 points.
What is the rating of the OnePlus Ace 6 and the Redmi K40?
The OnePlus Ace 6 has a MobileRank rating of 73/100, the Redmi K40 — 54/100.
Which is more powerful: the OnePlus Ace 6 or the Redmi K40?
The OnePlus Ace 6 leads on performance (92/100 vs 61/100).
Should you choose the OnePlus Ace 6 over the Redmi K40?
The OnePlus Ace 6 is a better fit for gamers and power users, those who care about battery life. The Redmi K40 is a better fit for active users.