OPPO K15 vs Vivo X300 Ultra
The OPPO K15 (2026) runs on the Dimensity 7360 Super, while the Vivo X300 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite Gen 5. By overall MobileRank rating, the Vivo X300 Ultra leads — 91/100 vs 63/100 (a 28-point difference). Key differences: the OPPO K15 has the bigger battery (8000 mAh vs 7000); the main camera is 50 MP vs 200 MP; the Vivo X300 Ultra is faster in AnTuTu (4,247,433 vs 877,641); the OPPO K15 is noticeably lighter (200g vs 230g).
OPPO K15
Vivo X300 Ultra
- Bigger battery: 8000 vs 7000 mAh
- Lighter: 200g vs 230g
- Better portability (60/100 vs 39/100)
- Higher AnTuTu: 4247433 vs 877641
- Better Geekbench Single: 3640 vs 1011
- Better Geekbench Multi: 11033 vs 2813
- Faster charging: 100W vs 80W
- Better main camera: 200MP vs 50MP
- Higher performance (99/100 vs 55/100)
- Better camera (96/100 vs 60/100)
- Longer battery life (85/100 vs 71/100)
- Better display (89/100 vs 85/100)
Comparing the OPPO K15 vs the Vivo X300 Ultra, the Vivo X300 Ultra scores 28 points higher (91/100 vs 63/100). In the "performance" category, the Vivo X300 Ultra leads (99/100 vs 55/100). In the "camera" category, the Vivo X300 Ultra leads (96/100 vs 60/100). In the "battery" category, the Vivo X300 Ultra leads (85/100 vs 71/100). In the "performance" category, the Vivo X300 Ultra significantly outperforms the OPPO K15 (99/100 vs 55/100). In the "display" category, the Vivo X300 Ultra and the OPPO K15 are nearly equal (89/100 vs 85/100). In the "camera" category, the Vivo X300 Ultra significantly outperforms the OPPO K15 (96/100 vs 60/100). In the "battery" category, the Vivo X300 Ultra is a bit better (85/100 vs 71/100). In the "portability" category, the OPPO K15 notably outperforms the Vivo X300 Ultra (60/100 vs 39/100).
| Specification | OPPO K15 | Vivo X300 Ultra | |
|---|---|---|---|
| Processor | Dimensity 7360 Super | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | 877641 | 4247433 | |
| Geekbench Single | 1011 | 3640 | |
| Geekbench Multi | 2813 | 11033 | |
| Display | 6.6" AMOLED | 6.8" LTPO OLED | |
| Resolution | 1256x2760 | 3168x1440 | |
| Refresh rate | 120 Hz | 120 Hz | |
| Battery | 8000 mAh | 7000 mAh | |
| Charging | 80W | 100W | |
| Wireless charging | 0W | 40W | |
| DXOMark (camera) | — | 170 | |
| Main camera | 50 MP | 200 MP | |
| Ultrawide | 50 MP | 50 MP | |
| Telephoto | 0 MP | 200 MP | |
| Front camera | 50 MP | 32 MP | |
| RAM | 12GB | 12GB / 16GB | |
| Storage | 256GB | 256GB / 512GB / 1TB | |
| OS | Android 16 | Android 16 | |
| NFC | yes | yes | |
| Protection | IP68 | IP69 | |
| Dimensions | — | 163.0×76.8×8.2 mm | |
| Weight | 200 g | 230 g | |
| Launch price | — | $950 |
OPPO K15
- Main: 50MP f/f/1.8
- Ultrawide: 50MP
- Front: 50MP
Vivo X300 Ultra
- Main: 200MP f/f/1.6
- Ultrawide: 50MP
- Telephoto: 200MP
- Front: 32MP
OPPO K15
- 6.6" AMOLED
- Resolution: 1256x2760
- Refresh rate: 120 Hz
Vivo X300 Ultra
- 6.8" LTPO OLED
- Resolution: 3168x1440
- Refresh rate: 120 Hz
OPPO K15
- 8000 mAh
- Wired: 80W
- No wireless charging
Vivo X300 Ultra
- 7000 mAh
- NanoReview test: web browsing 10:18 hrs, total 29:11 hrs
- Wired: 100W
- Wireless: 40W
We compared OPPO K15 and Vivo X300 Ultra, covering their specs and all relevant benchmarks.
Vivo X300 Ultra leads OPPO K15 by 79.3% in our overall performance rating.
OPPO K15
Price unknownperformance
In the "performance" category, the Vivo X300 Ultra significantly outperforms the OPPO K15 (99/100 vs 55/100).
display
In the "display" category, the Vivo X300 Ultra and the OPPO K15 are nearly equal (89/100 vs 85/100).
camera
In the "camera" category, the Vivo X300 Ultra significantly outperforms the OPPO K15 (96/100 vs 60/100).
battery
In the "battery" category, the Vivo X300 Ultra is a bit better (85/100 vs 71/100).
portability
In the "portability" category, the OPPO K15 notably outperforms the Vivo X300 Ultra (60/100 vs 39/100).
Which is better: the OPPO K15 or the Vivo X300 Ultra?
The Vivo X300 Ultra significantly outperforms the OPPO K15 by 28 points (91/100 vs 63/100).
What is the rating of the OPPO K15 and the Vivo X300 Ultra?
The OPPO K15 has a MobileRank rating of 63/100, the Vivo X300 Ultra — 91/100.
Which has the better camera: the OPPO K15 or the Vivo X300 Ultra?
The Vivo X300 Ultra leads on camera score (96/100 vs 60/100).
Which is more powerful: the OPPO K15 or the Vivo X300 Ultra?
The Vivo X300 Ultra leads on performance (99/100 vs 55/100).
Should you choose the OPPO K15 over the Vivo X300 Ultra?
The OPPO K15 is a better fit for everyday use. The Vivo X300 Ultra is a better fit for gamers and power users, mobile photography enthusiasts, those who care about battery life, budget-conscious buyers.