OnePlus Ace 6 Ultra vs Samsung Galaxy A51
The OnePlus Ace 6 Ultra (2026) runs on the MediaTek Dimensity 9500, while the Samsung Galaxy A51 (2020) runs on the Exynos 9611; launch prices were $555 and $399. By overall MobileRank rating, the OnePlus Ace 6 Ultra leads — 74/100 vs 34/100 (a 40-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 355,351); the Samsung Galaxy A51 is noticeably lighter (172g vs 217g).
Profile comparison
Category scores
OnePlus Ace 6 Ultra
Samsung Galaxy A51
What makes OnePlus Ace 6 Ultra better?
- Higher AnTuTu: 3429868 vs 355351
- Better Geekbench Single: 3293 vs 365
- Better Geekbench Multi: 10243 vs 1107
- Bigger battery: 8600 vs 4000 mAh
- Better main camera: 50MP vs 48MP
- Higher refresh rate: 165Hz vs 60Hz
- Higher performance (94/100 vs 25/100)
- Longer battery life (82/100 vs 25/100)
- Better display (94/100 vs 51/100)
What makes Samsung Galaxy A51 better?
- Lighter: 172g vs 217g
- Cheaper at launch: $399 vs $555
- Better camera (36/100 vs 35/100)
- Better portability (77/100 vs 43/100)
Comparison verdict
Comparing the OnePlus Ace 6 Ultra vs the Samsung Galaxy A51, the OnePlus Ace 6 Ultra scores 40 points higher (74/100 vs 34/100). In the "performance" category, the OnePlus Ace 6 Ultra leads (94/100 vs 25/100). In the "battery" category, the OnePlus Ace 6 Ultra leads (82/100 vs 25/100). Value score: OnePlus Ace 6 Ultra — 66/100, Samsung Galaxy A51 — 0/100; 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 significantly outperforms the Samsung Galaxy A51 (94/100 vs 25/100). In the "display" category, the OnePlus Ace 6 Ultra significantly outperforms the Samsung Galaxy A51 (94/100 vs 51/100). In the "camera" category, the Samsung Galaxy A51 and the OnePlus Ace 6 Ultra are nearly equal (36/100 vs 35/100). In the "battery" category, the OnePlus Ace 6 Ultra significantly outperforms the Samsung Galaxy A51 (82/100 vs 25/100). In the "portability" category, the Samsung Galaxy A51 significantly outperforms the OnePlus Ace 6 Ultra (77/100 vs 43/100).
Specs comparison
| Specification | OnePlus Ace 6 Ultra | Samsung Galaxy A51 | |
|---|---|---|---|
| Processor | MediaTek Dimensity 9500 | Exynos 9611 | |
| AnTuTu | 3429868 | 355351 | |
| Geekbench Single | 3293 | 365 | |
| Geekbench Multi | 10243 | 1107 | |
| Display | 6.8" AMOLED | 6.5" AMOLED | |
| Resolution | 1272x2772 | — | |
| Refresh rate | 165 Hz | 60 Hz | |
| Battery | 8600 mAh | 4000 mAh | |
| Charging | 120W | — | |
| Main camera | 50 MP | 48 MP | |
| Ultrawide | 8 MP | 0 MP | |
| Front camera | 16 MP | 32 MP | |
| RAM | 12GB / 16GB | 4GB / 6GB | |
| Storage | 256GB / 512GB / 1TB | 64GB / 128GB | |
| OS | Android 16 | — | |
| Brightness (peak) | 1800 nits | — | |
| NFC | yes | yes | |
| Protection | IP66 | — | |
| Dimensions | 162.5×77.5×8.5 mm | 158.5×73.6×7.9 mm | |
| Weight | 217 g | 172 g | |
| Launch price | $555 | $399 |
Camera comparison
OnePlus Ace 6 Ultra
- Main: 50MP f/1.8
- Ultrawide: 8MP
- Front: 16MP
Samsung Galaxy A51
- Main: 48MP
- Front: 32MP
Display comparison
OnePlus Ace 6 Ultra
- 6.8" AMOLED
- Resolution: 1272x2772
- Refresh rate: 165 Hz
Samsung Galaxy A51
- 6.5" AMOLED
- Refresh rate: 60 Hz
Battery and charging
OnePlus Ace 6 Ultra
- 8600 mAh
- Wired: 120W
- No wireless charging
Samsung Galaxy A51
- 4000 mAh
- No wireless charging
Overall performance score
We compared OnePlus Ace 6 Ultra and Samsung Galaxy A51, covering their specs and all relevant benchmarks.
OnePlus Ace 6 Ultra leads Samsung Galaxy A51 by 865.2% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $156. Samsung Galaxy A51 was $156 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the OnePlus Ace 6 Ultra significantly outperforms the Samsung Galaxy A51 (94/100 vs 25/100).
display
In the "display" category, the OnePlus Ace 6 Ultra significantly outperforms the Samsung Galaxy A51 (94/100 vs 51/100).
camera
In the "camera" category, the Samsung Galaxy A51 and the OnePlus Ace 6 Ultra are nearly equal (36/100 vs 35/100).
battery
In the "battery" category, the OnePlus Ace 6 Ultra significantly outperforms the Samsung Galaxy A51 (82/100 vs 25/100).
portability
In the "portability" category, the Samsung Galaxy A51 significantly outperforms the OnePlus Ace 6 Ultra (77/100 vs 43/100).
Frequently asked questions
Which is better: the OnePlus Ace 6 Ultra or the Samsung Galaxy A51?
The OnePlus Ace 6 Ultra significantly outperforms the Samsung Galaxy A51 by 40 points (74/100 vs 34/100).
What is the rating of the OnePlus Ace 6 Ultra and the Samsung Galaxy A51?
The OnePlus Ace 6 Ultra has a MobileRank rating of 74/100, the Samsung Galaxy A51 — 34/100.
Which is more powerful: the OnePlus Ace 6 Ultra or the Samsung Galaxy A51?
The OnePlus Ace 6 Ultra leads on performance (94/100 vs 25/100).
Should you choose the OnePlus Ace 6 Ultra over the Samsung Galaxy A51?
The OnePlus Ace 6 Ultra is a better fit for gamers and power users, those who care about battery life.