Oppo K15s vs Vivo X300 Ultra
The Oppo K15s (2026) runs on the MediaTek Dimensity 6360 Max, 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 49/100 (a 42-point difference). Key differences: the Oppo K15s has the bigger battery (8000 mAh vs 7000); the main camera is 50 MP vs 200 MP; the Oppo K15s is noticeably lighter (205g vs 230g).
Profile comparison
Category scores
Oppo K15s
Vivo X300 Ultra
What makes Oppo K15s better?
- Bigger battery: 8000 vs 7000 mAh
- Lighter: 205g vs 230g
- Better portability (47/100 vs 39/100)
What makes Vivo X300 Ultra better?
- Better Geekbench Single: 3639 vs 850
- Better Geekbench Multi: 11047 vs 2250
- Faster charging: 100W vs 45W
- Better main camera: 200MP vs 50MP
- Higher performance (99/100 vs 43/100)
- Better camera (96/100 vs 30/100)
- Longer battery life (85/100 vs 64/100)
- Better display (89/100 vs 80/100)
Comparison verdict
Comparing the Oppo K15s vs the Vivo X300 Ultra, the Vivo X300 Ultra scores 42 points higher (91/100 vs 49/100). In the "performance" category, the Vivo X300 Ultra leads (99/100 vs 43/100). In the "camera" category, the Vivo X300 Ultra leads (96/100 vs 30/100). In the "battery" category, the Vivo X300 Ultra leads (85/100 vs 64/100). In the "performance" category, the Vivo X300 Ultra significantly outperforms the Oppo K15s (99/100 vs 43/100). In the "display" category, the Vivo X300 Ultra is a bit better (89/100 vs 80/100). In the "camera" category, the Vivo X300 Ultra significantly outperforms the Oppo K15s (96/100 vs 30/100). In the "battery" category, the Vivo X300 Ultra notably outperforms the Oppo K15s (85/100 vs 64/100). In the "portability" category, the Oppo K15s is a bit better (47/100 vs 39/100).
Specs comparison
| Specification | Oppo K15s | Vivo X300 Ultra | |
|---|---|---|---|
| Processor | MediaTek Dimensity 6360 Max | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | — | 4247433 | |
| Geekbench Single | 850 | 3639 | |
| Geekbench Multi | 2250 | 11047 | |
| Display | 6.6" AMOLED | 6.8" LTPO OLED | |
| Resolution | 1080x2372 | 3168x1440 | |
| Refresh rate | 120 Hz | 120 Hz | |
| Battery | 8000 mAh | 7000 mAh | |
| Charging | 45W | 100W | |
| Wireless charging | 0W | 40W | |
| DXOMark (camera) | — | 170 | |
| Main camera | 50 MP | 200 MP | |
| Ultrawide | 0 MP | 50 MP | |
| Telephoto | 0 MP | 200 MP | |
| Front camera | 8 MP | 32 MP | |
| RAM | 6GB / 8GB | 12GB / 16GB | |
| Storage | 128GB / 256GB | 256GB / 512GB / 1TB | |
| OS | Android 16, ColorOS 16 | Android 16 | |
| Brightness (peak) | 1400 nits | — | |
| NFC | yes | yes | |
| Protection | IP68 | IP69 | |
| Dimensions | 159.1×75.8×8.8 mm | 163.0×76.8×8.2 mm | |
| Weight | 205 g | 230 g | |
| Launch price | — | $950 |
Camera comparison
Oppo K15s
- Main: 50MP f/1.9
- Front: 8MP
Vivo X300 Ultra
- Main: 200MP f/1.6
- Ultrawide: 50MP
- Telephoto: 200MP
- Front: 32MP
Display comparison
Oppo K15s
- 6.6" AMOLED
- Resolution: 1080x2372
- Refresh rate: 120 Hz
Vivo X300 Ultra
- 6.8" LTPO OLED
- Resolution: 3168x1440
- Refresh rate: 120 Hz
Battery and charging
Oppo K15s
- 8000 mAh
- Wired: 45W
- No wireless charging
Vivo X300 Ultra
- 7000 mAh
- NanoReview test: web browsing 10:18 hrs, total 29:11 hrs
- Wired: 100W
- Wireless: 40W
Benchmarks
Launch prices and where to check today's
Oppo K15s
Price unknownDetailed category analysis
performance
In the "performance" category, the Vivo X300 Ultra significantly outperforms the Oppo K15s (99/100 vs 43/100).
display
In the "display" category, the Vivo X300 Ultra is a bit better (89/100 vs 80/100).
camera
In the "camera" category, the Vivo X300 Ultra significantly outperforms the Oppo K15s (96/100 vs 30/100).
battery
In the "battery" category, the Vivo X300 Ultra notably outperforms the Oppo K15s (85/100 vs 64/100).
portability
In the "portability" category, the Oppo K15s is a bit better (47/100 vs 39/100).
Frequently asked questions
Which is better: the Oppo K15s or the Vivo X300 Ultra?
The Vivo X300 Ultra significantly outperforms the Oppo K15s by 42 points (91/100 vs 49/100).
What is the rating of the Oppo K15s and the Vivo X300 Ultra?
The Oppo K15s has a MobileRank rating of 49/100, the Vivo X300 Ultra — 91/100.
Which has the better camera: the Oppo K15s or the Vivo X300 Ultra?
The Vivo X300 Ultra leads on camera score (96/100 vs 30/100).
Which is more powerful: the Oppo K15s or the Vivo X300 Ultra?
The Vivo X300 Ultra leads on performance (99/100 vs 43/100).
Should you choose the Oppo K15s 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.