Realme 15 vs Vivo X300 Ultra
The Realme 15 (2025) runs on the MediaTek Dimensity 7300+, while the Vivo X300 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite Gen 5; launch prices were $249 and $950. By overall MobileRank rating, the Vivo X300 Ultra leads — 91/100 vs 62/100 (a 29-point difference). Key differences: the main camera is 50 MP vs 200 MP; the Vivo X300 Ultra is faster in AnTuTu (4,247,433 vs 879,714); the Realme 15 is noticeably lighter (185g vs 230g).
Profile comparison
Category scores
Realme 15
Vivo X300 Ultra
What makes Realme 15 better?
- Higher refresh rate: 144Hz vs 120Hz
- Lighter: 185g vs 230g
- Cheaper at launch: $249 vs $950
- Better portability (74/100 vs 39/100)
What makes Vivo X300 Ultra better?
- Higher AnTuTu: 4247433 vs 879714
- Better Geekbench Single: 3639 vs 1011
- Better Geekbench Multi: 11047 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 44/100)
- Longer battery life (85/100 vs 80/100)
Comparison verdict
Comparing the Realme 15 vs the Vivo X300 Ultra, the Vivo X300 Ultra scores 29 points higher (91/100 vs 62/100). 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 44/100). Value score: Realme 15 — 74/100, Vivo X300 Ultra — 94/100; 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 Vivo X300 Ultra significantly outperforms the Realme 15 (99/100 vs 55/100). In the "display" category, both devices are on the same level — 89/100. In the "camera" category, the Vivo X300 Ultra significantly outperforms the Realme 15 (96/100 vs 44/100). In the "battery" category, the Vivo X300 Ultra is a bit better (85/100 vs 80/100). In the "portability" category, the Realme 15 significantly outperforms the Vivo X300 Ultra (74/100 vs 39/100).
Specs comparison
| Specification | Realme 15 | Vivo X300 Ultra | |
|---|---|---|---|
| Processor | MediaTek Dimensity 7300+ | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | 879714 | 4247433 | |
| Geekbench Single | 1011 | 3639 | |
| Geekbench Multi | 2813 | 11047 | |
| Display | 6.8" AMOLED | 6.8" LTPO OLED | |
| Resolution | 2392x1080 | 3168x1440 | |
| Refresh rate | 144 Hz | 120 Hz | |
| Battery | 7000 mAh | 7000 mAh | |
| Charging | 80W | 100W | |
| Wireless charging | — | 40W | |
| DXOMark (camera) | — | 170 | |
| Main camera | 50 MP | 200 MP | |
| Ultrawide | 8 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 15 | Android 16 | |
| NFC | — | yes | |
| Protection | — | IP69 | |
| Dimensions | — | 163.0×76.8×8.2 mm | |
| Weight | 185 g | 230 g | |
| Launch price | $249 | $950 |
Camera comparison
Realme 15
- Main: 50MP f/1.8
- Ultrawide: 8MP
- Front: 50MP
Vivo X300 Ultra
- Main: 200MP f/1.6
- Ultrawide: 50MP
- Telephoto: 200MP
- Front: 32MP
Display comparison
Realme 15
- 6.8" AMOLED
- Resolution: 2392x1080
- Refresh rate: 144 Hz
Vivo X300 Ultra
- 6.8" LTPO OLED
- Resolution: 3168x1440
- Refresh rate: 120 Hz
Battery and charging
Realme 15
- 7000 mAh
- Wired: 80W
- Wireless charging: no data
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 Realme 15 and Vivo X300 Ultra, covering their specs and all relevant benchmarks.
Vivo X300 Ultra leads Realme 15 by 79.3% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $701. Realme 15 was $701 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Vivo X300 Ultra significantly outperforms the Realme 15 (99/100 vs 55/100).
display
In the "display" category, both devices are on the same level — 89/100.
camera
In the "camera" category, the Vivo X300 Ultra significantly outperforms the Realme 15 (96/100 vs 44/100).
battery
In the "battery" category, the Vivo X300 Ultra is a bit better (85/100 vs 80/100).
portability
In the "portability" category, the Realme 15 significantly outperforms the Vivo X300 Ultra (74/100 vs 39/100).
Frequently asked questions
Which is better: the Realme 15 or the Vivo X300 Ultra?
The Vivo X300 Ultra significantly outperforms the Realme 15 by 29 points (91/100 vs 62/100).
What is the rating of the Realme 15 and the Vivo X300 Ultra?
The Realme 15 has a MobileRank rating of 62/100, the Vivo X300 Ultra — 91/100.
Which has the better camera: the Realme 15 or the Vivo X300 Ultra?
The Vivo X300 Ultra leads on camera score (96/100 vs 44/100).
Which is more powerful: the Realme 15 or the Vivo X300 Ultra?
The Vivo X300 Ultra leads on performance (99/100 vs 55/100).
Should you choose the Realme 15 over the Vivo X300 Ultra?
The Realme 15 is a better fit for those who care about battery life. 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.