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 64/100 (a 27-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 990,352); the OPPO K15 is noticeably lighter (200g vs 230g).
Profile comparison
Category scores
OPPO K15
Vivo X300 Ultra
What makes OPPO K15 better?
- Bigger battery: 8000 vs 7000 mAh
- Lighter: 200g vs 230g
- Better portability (60/100 vs 39/100)
What makes Vivo X300 Ultra better?
- Higher AnTuTu: 4247433 vs 990352
- Better Geekbench Single: 3639 vs 1025
- Better Geekbench Multi: 11047 vs 2882
- Faster charging: 100W vs 80W
- Better main camera: 200MP vs 50MP
- Higher performance (99/100 vs 57/100)
- Better camera (96/100 vs 60/100)
- Longer battery life (85/100 vs 71/100)
- Better display (89/100 vs 85/100)
Comparison verdict
Comparing the OPPO K15 vs the Vivo X300 Ultra, the Vivo X300 Ultra scores 27 points higher (91/100 vs 64/100). In the "performance" category, the Vivo X300 Ultra leads (99/100 vs 57/100). 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 57/100). 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).
Specs comparison
| Specification | OPPO K15 | Vivo X300 Ultra | |
|---|---|---|---|
| Processor | Dimensity 7360 Super | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | 990352 | 4247433 | |
| Geekbench Single | 1025 | 3639 | |
| Geekbench Multi | 2882 | 11047 | |
| 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 |
Camera comparison
OPPO K15
- Main: 50MP f/1.8
- Ultrawide: 50MP
- Front: 50MP
Vivo X300 Ultra
- Main: 200MP f/1.6
- Ultrawide: 50MP
- Telephoto: 200MP
- Front: 32MP
Display comparison
OPPO K15
- 6.6" AMOLED
- Resolution: 1256x2760
- Refresh rate: 120 Hz
Vivo X300 Ultra
- 6.8" LTPO OLED
- Resolution: 3168x1440
- Refresh rate: 120 Hz
Battery and charging
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
Overall performance score
We compared OPPO K15 and Vivo X300 Ultra, covering their specs and all relevant benchmarks.
Vivo X300 Ultra leads OPPO K15 by 76.7% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
OPPO K15
Price unknownDetailed category analysis
performance
In the "performance" category, the Vivo X300 Ultra significantly outperforms the OPPO K15 (99/100 vs 57/100).
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).
Frequently asked questions
Which is better: the OPPO K15 or the Vivo X300 Ultra?
The Vivo X300 Ultra significantly outperforms the OPPO K15 by 27 points (91/100 vs 64/100).
What is the rating of the OPPO K15 and the Vivo X300 Ultra?
The OPPO K15 has a MobileRank rating of 64/100, 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 57/100).
Should you choose the OPPO K15 over the Vivo X300 Ultra?
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.