Realme 15x vs Vivo X300 Ultra
The Realme 15x (2025) runs on the MediaTek Dimensity 6300, while the Vivo X300 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite Gen 5; launch prices were $250 and $950. By overall MobileRank rating, the Vivo X300 Ultra leads — 91/100 vs 51/100 (a 40-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 524,785); the Vivo X300 Ultra has NFC for contactless payments, the Realme 15x doesn't; the Realme 15x is noticeably lighter (212g vs 230g).
Realme 15x
Vivo X300 Ultra
- Higher refresh rate: 144Hz vs 120Hz
- Lighter: 212g vs 230g
- Cheaper at launch: $250 vs $950
- Better portability (49/100 vs 39/100)
- Higher AnTuTu: 4247433 vs 524785
- Better Geekbench Single: 3640 vs 771
- Better Geekbench Multi: 11033 vs 1980
- Faster charging: 100W vs 60W
- Better main camera: 200MP vs 50MP
- Higher performance (99/100 vs 43/100)
- Better camera (96/100 vs 40/100)
- Longer battery life (85/100 vs 75/100)
- Better display (89/100 vs 65/100)
Comparing the Realme 15x vs the Vivo X300 Ultra, the Vivo X300 Ultra scores 40 points higher (91/100 vs 51/100). 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 40/100). In the "battery" category, the Vivo X300 Ultra leads (85/100 vs 75/100). Value score: Realme 15x — 54/100, Vivo X300 Ultra — 94/100; it is biased by price level, so it should not be compared directly between devices at different prices. In the "performance" category, the Vivo X300 Ultra significantly outperforms the Realme 15x (99/100 vs 43/100). In the "display" category, the Vivo X300 Ultra notably outperforms the Realme 15x (89/100 vs 65/100). In the "camera" category, the Vivo X300 Ultra significantly outperforms the Realme 15x (96/100 vs 40/100). In the "battery" category, the Vivo X300 Ultra is a bit better (85/100 vs 75/100). In the "portability" category, the Realme 15x is a bit better (49/100 vs 39/100).
| Specification | Realme 15x | Vivo X300 Ultra | |
|---|---|---|---|
| Processor | MediaTek Dimensity 6300 | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | 524785 | 4247433 | |
| Geekbench Single | 771 | 3640 | |
| Geekbench Multi | 1980 | 11033 | |
| Display | 6.8" IPS LCD | 6.8" LTPO OLED | |
| Resolution | 720x1570 | 3168x1440 | |
| Refresh rate | 144 Hz | 120 Hz | |
| Battery | 7000 mAh | 7000 mAh | |
| Charging | 60W | 100W | |
| Wireless charging | — | 40W | |
| DXOMark (camera) | — | 170 | |
| Main camera | 50 MP | 200 MP | |
| Ultrawide | 0 MP | 50 MP | |
| Telephoto | 0 MP | 200 MP | |
| Front camera | 50 MP | 32 MP | |
| RAM | 6GB / 8GB | 12GB / 16GB | |
| Storage | 128GB / 256GB | 256GB / 512GB / 1TB | |
| OS | Android 15 | Android 16 | |
| Brightness (peak) | 1200 nits | — | |
| NFC | no | yes | |
| Protection | IP68/IP69 | IP69 | |
| Dimensions | 166.1×77.9×8.3 mm | 163.0×76.8×8.2 mm | |
| Weight | 212 g | 230 g | |
| Launch price | $250 | $950 |
Realme 15x
- Main: 50MP f/1.8
- Front: 50MP
Vivo X300 Ultra
- Main: 200MP f/f/1.6
- Ultrawide: 50MP
- Telephoto: 200MP
- Front: 32MP
Realme 15x
- 6.8" IPS LCD
- Resolution: 720x1570
- Refresh rate: 144 Hz
Vivo X300 Ultra
- 6.8" LTPO OLED
- Resolution: 3168x1440
- Refresh rate: 120 Hz
Realme 15x
- 7000 mAh
- Wired: 60W
- Wireless charging: no data
Vivo X300 Ultra
- 7000 mAh
- NanoReview test: web browsing 10:18 hrs, total 29:11 hrs
- Wired: 100W
- Wireless: 40W
We compared Realme 15x and Vivo X300 Ultra, covering their specs and all relevant benchmarks.
Vivo X300 Ultra leads Realme 15x by 87.6% in our overall performance rating.
Launch price difference: $700. Realme 15x was $700 cheaper at launch.
performance
In the "performance" category, the Vivo X300 Ultra significantly outperforms the Realme 15x (99/100 vs 43/100).
display
In the "display" category, the Vivo X300 Ultra notably outperforms the Realme 15x (89/100 vs 65/100).
camera
In the "camera" category, the Vivo X300 Ultra significantly outperforms the Realme 15x (96/100 vs 40/100).
battery
In the "battery" category, the Vivo X300 Ultra is a bit better (85/100 vs 75/100).
portability
In the "portability" category, the Realme 15x is a bit better (49/100 vs 39/100).
Which is better: the Realme 15x or the Vivo X300 Ultra?
The Vivo X300 Ultra significantly outperforms the Realme 15x by 40 points (91/100 vs 51/100).
What is the rating of the Realme 15x and the Vivo X300 Ultra?
The Realme 15x has a MobileRank rating of 51/100, the Vivo X300 Ultra — 91/100.
Which has the better camera: the Realme 15x or the Vivo X300 Ultra?
The Vivo X300 Ultra leads on camera score (96/100 vs 40/100).
Which is more powerful: the Realme 15x or the Vivo X300 Ultra?
The Vivo X300 Ultra leads on performance (99/100 vs 43/100).
Should you choose the Realme 15x over the Vivo X300 Ultra?
The Realme 15x 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.