OnePlus 15 vs Samsung Galaxy A51
The OnePlus 15 (2025) runs on the Qualcomm Snapdragon 8 Elite Gen 5, while the Samsung Galaxy A51 (2020) runs on the Exynos 9611; launch prices were $799 and $399. By overall MobileRank rating, the OnePlus 15 leads — 86/100 vs 34/100 (a 52-point difference). Key differences: the OnePlus 15 has the bigger battery (6500 mAh vs 4000); the main camera is 50 MP vs 48 MP; the OnePlus 15 is faster in AnTuTu (3,606,149 vs 355,351); the Samsung Galaxy A51 is noticeably lighter (172g vs 213g).
Profile comparison
Category scores
OnePlus 15
Samsung Galaxy A51
What makes OnePlus 15 better?
- Higher AnTuTu: 3606149 vs 355351
- Better Geekbench Single: 3639 vs 365
- Better Geekbench Multi: 11047 vs 1107
- Bigger battery: 6500 vs 4000 mAh
- Better main camera: 50MP vs 48MP
- Higher refresh rate: 120Hz vs 60Hz
- Higher performance (97/100 vs 25/100)
- Better camera (78/100 vs 36/100)
- Longer battery life (89/100 vs 25/100)
- Better display (84/100 vs 51/100)
What makes Samsung Galaxy A51 better?
- Lighter: 172g vs 213g
- Cheaper at launch: $399 vs $799
- Better portability (77/100 vs 50/100)
Comparison verdict
Comparing the OnePlus 15 vs the Samsung Galaxy A51, the OnePlus 15 scores 52 points higher (86/100 vs 34/100). In the "performance" category, the OnePlus 15 leads (97/100 vs 25/100). In the "camera" category, the OnePlus 15 leads (78/100 vs 36/100). In the "battery" category, the OnePlus 15 leads (89/100 vs 25/100). Value score: OnePlus 15 — 86/100, 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 15 significantly outperforms the Samsung Galaxy A51 (97/100 vs 25/100). In the "display" category, the OnePlus 15 significantly outperforms the Samsung Galaxy A51 (84/100 vs 51/100). In the "camera" category, the OnePlus 15 significantly outperforms the Samsung Galaxy A51 (78/100 vs 36/100). In the "battery" category, the OnePlus 15 significantly outperforms the Samsung Galaxy A51 (89/100 vs 25/100). In the "portability" category, the Samsung Galaxy A51 notably outperforms the OnePlus 15 (77/100 vs 50/100).
Specs comparison
| Specification | OnePlus 15 | Samsung Galaxy A51 | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite Gen 5 | Exynos 9611 | |
| AnTuTu | 3606149 | 355351 | |
| Geekbench Single | 3639 | 365 | |
| Geekbench Multi | 11047 | 1107 | |
| Display | 6.8" AMOLED | 6.5" AMOLED | |
| Resolution | 1272x2772 | — | |
| Refresh rate | 120 Hz | 60 Hz | |
| Battery | 6500 mAh | 4000 mAh | |
| Charging | 120W | — | |
| Wireless charging | 50W | 0W | |
| Main camera | 50 MP | 48 MP | |
| Ultrawide | 50 MP | 0 MP | |
| Telephoto | 50 MP | 0 MP | |
| Front camera | 32 MP | 32 MP | |
| RAM | 12GB / 16GB | 4GB / 6GB | |
| Storage | 256GB / 512GB | 64GB / 128GB | |
| OS | Android 16, OxygenOS 16 (Global), ColorOS 16 (China) | — | |
| Brightness (peak) | 1800 nits | — | |
| NFC | yes | yes | |
| Protection | IP68 | — | |
| Dimensions | 161.4×76.7×8.1 mm | 158.5×73.6×7.9 mm | |
| Weight | 213 g | 172 g | |
| Launch price | $799 | $399 |
Camera comparison
OnePlus 15
- Main: 50MP f/1.8
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Samsung Galaxy A51
- Main: 48MP
- Front: 32MP
Display comparison
OnePlus 15
- 6.8" AMOLED
- Resolution: 1272x2772
- Refresh rate: 120 Hz
Samsung Galaxy A51
- 6.5" AMOLED
- Refresh rate: 60 Hz
Battery and charging
OnePlus 15
- 6500 mAh
- Wired: 120W
- Wireless: 50W
Samsung Galaxy A51
- 4000 mAh
- No wireless charging
Overall performance score
We compared OnePlus 15 and Samsung Galaxy A51, covering their specs and all relevant benchmarks.
OnePlus 15 leads Samsung Galaxy A51 by 914.8% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $400. Samsung Galaxy A51 was $400 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the OnePlus 15 significantly outperforms the Samsung Galaxy A51 (97/100 vs 25/100).
display
In the "display" category, the OnePlus 15 significantly outperforms the Samsung Galaxy A51 (84/100 vs 51/100).
camera
In the "camera" category, the OnePlus 15 significantly outperforms the Samsung Galaxy A51 (78/100 vs 36/100).
battery
In the "battery" category, the OnePlus 15 significantly outperforms the Samsung Galaxy A51 (89/100 vs 25/100).
portability
In the "portability" category, the Samsung Galaxy A51 notably outperforms the OnePlus 15 (77/100 vs 50/100).
Frequently asked questions
Which is better: the OnePlus 15 or the Samsung Galaxy A51?
The OnePlus 15 significantly outperforms the Samsung Galaxy A51 by 52 points (86/100 vs 34/100).
What is the rating of the OnePlus 15 and the Samsung Galaxy A51?
The OnePlus 15 has a MobileRank rating of 86/100, the Samsung Galaxy A51 — 34/100.
Which has the better camera: the OnePlus 15 or the Samsung Galaxy A51?
The OnePlus 15 leads on camera score (78/100 vs 36/100).
Which is more powerful: the OnePlus 15 or the Samsung Galaxy A51?
The OnePlus 15 leads on performance (97/100 vs 25/100).
Should you choose the OnePlus 15 over the Samsung Galaxy A51?
The OnePlus 15 is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers.