OPPO K15 Pro+ vs Samsung Galaxy S21 Ultra
The OPPO K15 Pro+ (2026) runs on the MediaTek Dimensity 9500s, while the Samsung Galaxy S21 Ultra (2021) runs on the Samsung Exynos 2100; launch prices were $509 and $1199. By overall MobileRank rating, the OPPO K15 Pro+ leads — 71/100 vs 61/100 (a 10-point difference). Key differences: the OPPO K15 Pro+ has the bigger battery (8000 mAh vs 5000); the main camera is 50 MP vs 108 MP; the OPPO K15 Pro+ is faster in AnTuTu (3,121,723 vs 1,074,182).
OPPO K15 Pro+
Samsung Galaxy S21 Ultra
- Higher AnTuTu: 3121723 vs 1074182
- Better Geekbench Single: 2680 vs 1435
- Better Geekbench Multi: 8358 vs 3555
- Bigger battery: 8000 vs 5000 mAh
- Faster charging: 100W vs 25W
- Higher refresh rate: 165Hz vs 120Hz
- Lighter: 219g vs 228g
- Cheaper at launch: $509 vs $1199
- Higher performance (89/100 vs 63/100)
- Longer battery life (75/100 vs 52/100)
- Better display (94/100 vs 89/100)
- Better portability (44/100 vs 33/100)
- Better main camera: 108MP vs 50MP
- Better camera (55/100 vs 35/100)
Comparing the OPPO K15 Pro+ vs the Samsung Galaxy S21 Ultra, the OPPO K15 Pro+ scores 10 points higher (71/100 vs 61/100). In the "performance" category, the OPPO K15 Pro+ leads (89/100 vs 63/100). In the "camera" category, the Samsung Galaxy S21 Ultra leads (55/100 vs 35/100). In the "battery" category, the OPPO K15 Pro+ leads (75/100 vs 52/100). Value score: OPPO K15 Pro+ — 66/100, Samsung Galaxy S21 Ultra — 32/100; it is biased by price level, so it should not be compared directly between devices at different prices. In the "performance" category, the OPPO K15 Pro+ notably outperforms the Samsung Galaxy S21 Ultra (89/100 vs 63/100). In the "display" category, the OPPO K15 Pro+ is a bit better (94/100 vs 89/100). In the "camera" category, the Samsung Galaxy S21 Ultra notably outperforms the OPPO K15 Pro+ (55/100 vs 35/100). In the "battery" category, the OPPO K15 Pro+ notably outperforms the Samsung Galaxy S21 Ultra (75/100 vs 52/100). In the "portability" category, the OPPO K15 Pro+ is a bit better (44/100 vs 33/100).
| Specification | OPPO K15 Pro+ | Samsung Galaxy S21 Ultra | |
|---|---|---|---|
| Processor | MediaTek Dimensity 9500s | Samsung Exynos 2100 | |
| AnTuTu | 3121723 | 1074182 | |
| Geekbench Single | 2680 | 1435 | |
| Geekbench Multi | 8358 | 3555 | |
| Display | 6.8" AMOLED | 6.8" AMOLED | |
| Resolution | 2772x1272 | 3200x1440 | |
| Refresh rate | 165 Hz | 120 Hz | |
| Battery | 8000 mAh | 5000 mAh | |
| Charging | 100W | 25W | |
| Wireless charging | 0W | 15W | |
| DXOMark (camera) | — | 117 | |
| Main camera | 50 MP | 108 MP | |
| Ultrawide | 8 MP | 12 MP | |
| Telephoto | 0 MP | 10 MP | |
| Front camera | 16 MP | 40 MP | |
| RAM | 12GB | 12GB / 16GB | |
| Storage | 256GB / 512GB | 128GB / 256GB / 512GB | |
| OS | Android 16 | Android 11 | |
| Brightness (peak) | 1800 nits | 1500 nits | |
| NFC | yes | yes | |
| Protection | IP68 | IP68 | |
| Dimensions | 162.4×77.5×8.3 mm | 165.1×75.6×8.9 mm | |
| Weight | 219 g | 228 g | |
| Launch price | $509 | $1199 |
OPPO K15 Pro+
- Main: 50MP f/f/1.8
- Ultrawide: 8MP
- Front: 16MP
Samsung Galaxy S21 Ultra
- Main: 108MP f/1.8
- Ultrawide: 12MP
- Telephoto: 10MP
- Front: 40MP
OPPO K15 Pro+
- 6.8" AMOLED
- Resolution: 2772x1272
- Refresh rate: 165 Hz
Samsung Galaxy S21 Ultra
- 6.8" AMOLED
- Resolution: 3200x1440
- Refresh rate: 120 Hz
OPPO K15 Pro+
- 8000 mAh
- Wired: 100W
- No wireless charging
Samsung Galaxy S21 Ultra
- 5000 mAh
- Wired: 25W
- Wireless: 15W
We compared OPPO K15 Pro+ and Samsung Galaxy S21 Ultra, covering their specs and all relevant benchmarks.
OPPO K15 Pro+ leads Samsung Galaxy S21 Ultra by 190.6% in our overall performance rating.
Launch price difference: $690. OPPO K15 Pro+ was $690 cheaper at launch.
performance
In the "performance" category, the OPPO K15 Pro+ notably outperforms the Samsung Galaxy S21 Ultra (89/100 vs 63/100).
display
In the "display" category, the OPPO K15 Pro+ is a bit better (94/100 vs 89/100).
camera
In the "camera" category, the Samsung Galaxy S21 Ultra notably outperforms the OPPO K15 Pro+ (55/100 vs 35/100).
battery
In the "battery" category, the OPPO K15 Pro+ notably outperforms the Samsung Galaxy S21 Ultra (75/100 vs 52/100).
portability
In the "portability" category, the OPPO K15 Pro+ is a bit better (44/100 vs 33/100).
Which is better: the OPPO K15 Pro+ or the Samsung Galaxy S21 Ultra?
The OPPO K15 Pro+ is noticeably better than the Samsung Galaxy S21 Ultra — the overall rating gap is 10 points.
What is the rating of the OPPO K15 Pro+ and the Samsung Galaxy S21 Ultra?
The OPPO K15 Pro+ has a MobileRank rating of 71/100, the Samsung Galaxy S21 Ultra — 61/100.
Which has the better camera: the OPPO K15 Pro+ or the Samsung Galaxy S21 Ultra?
The Samsung Galaxy S21 Ultra leads on camera score (55/100 vs 35/100).
Which is more powerful: the OPPO K15 Pro+ or the Samsung Galaxy S21 Ultra?
The OPPO K15 Pro+ leads on performance (89/100 vs 63/100).
Should you choose the OPPO K15 Pro+ over the Samsung Galaxy S21 Ultra?
The OPPO K15 Pro+ is a better fit for gamers and power users, those who care about battery life. The Samsung Galaxy S21 Ultra is a better fit for active users.