Realme 15T vs Vivo X300 Ultra
The Realme 15T (2026) runs on the MediaTek Dimensity 6400 Max, 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 50/100 (a 41-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 581,041); the Vivo X300 Ultra has NFC for contactless payments, the Realme 15T doesn't; the Realme 15T is noticeably lighter (210g vs 230g).
Profile comparison
Category scores
Realme 15T
Vivo X300 Ultra
What makes Realme 15T better?
- Lighter: 210g vs 230g
- Cheaper at launch: $250 vs $950
- Better portability (55/100 vs 39/100)
What makes Vivo X300 Ultra better?
- Higher AnTuTu: 4247433 vs 581041
- Better Geekbench Single: 3639 vs 803
- Better Geekbench Multi: 11047 vs 2047
- Faster charging: 100W vs 60W
- Better main camera: 200MP vs 50MP
- Higher performance (99/100 vs 45/100)
- Better camera (96/100 vs 32/100)
- Longer battery life (85/100 vs 63/100)
- Better display (89/100 vs 79/100)
Comparison verdict
Comparing the Realme 15T vs the Vivo X300 Ultra, the Vivo X300 Ultra scores 41 points higher (91/100 vs 50/100). In the "performance" category, the Vivo X300 Ultra leads (99/100 vs 45/100). In the "camera" category, the Vivo X300 Ultra leads (96/100 vs 32/100). In the "battery" category, the Vivo X300 Ultra leads (85/100 vs 63/100). Value score: Realme 15T — 50/100, 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 15T (99/100 vs 45/100). In the "display" category, the Vivo X300 Ultra is a bit better (89/100 vs 79/100). In the "camera" category, the Vivo X300 Ultra significantly outperforms the Realme 15T (96/100 vs 32/100). In the "battery" category, the Vivo X300 Ultra notably outperforms the Realme 15T (85/100 vs 63/100). In the "portability" category, the Realme 15T notably outperforms the Vivo X300 Ultra (55/100 vs 39/100).
Specs comparison
| Specification | Realme 15T | Vivo X300 Ultra | |
|---|---|---|---|
| Processor | MediaTek Dimensity 6400 Max | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | 581041 | 4247433 | |
| Geekbench Single | 803 | 3639 | |
| Geekbench Multi | 2047 | 11047 | |
| Display | 6.8" AMOLED | 6.8" LTPO OLED | |
| Resolution | 1080x2372 | 3168x1440 | |
| Refresh rate | 120 Hz | 120 Hz | |
| Battery | 7000 mAh | 7000 mAh | |
| Charging | 60W | 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 | 16 MP | 32 MP | |
| RAM | 8GB / 12GB | 12GB / 16GB | |
| Storage | 128GB / 256GB | 256GB / 512GB / 1TB | |
| OS | Android 15, up to 3 major Android upgrades, Realme UI 6.0 | Android 16 | |
| Brightness (peak) | 4000 nits | — | |
| NFC | no | yes | |
| Protection | IP68 | IP69 | |
| Dimensions | 158.4×75.2×7.8 mm | 163.0×76.8×8.2 mm | |
| Weight | 210 g | 230 g | |
| Launch price | $250 | $950 |
Camera comparison
Realme 15T
- Main: 50MP f/1.8
- Front: 16MP
Vivo X300 Ultra
- Main: 200MP f/1.6
- Ultrawide: 50MP
- Telephoto: 200MP
- Front: 32MP
Display comparison
Realme 15T
- 6.8" AMOLED
- Resolution: 1080x2372
- Refresh rate: 120 Hz
Vivo X300 Ultra
- 6.8" LTPO OLED
- Resolution: 3168x1440
- Refresh rate: 120 Hz
Battery and charging
Realme 15T
- 7000 mAh
- Wired: 60W
- 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 Realme 15T and Vivo X300 Ultra, covering their specs and all relevant benchmarks.
Vivo X300 Ultra leads Realme 15T by 86.3% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $700. Realme 15T was $700 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Vivo X300 Ultra significantly outperforms the Realme 15T (99/100 vs 45/100).
display
In the "display" category, the Vivo X300 Ultra is a bit better (89/100 vs 79/100).
camera
In the "camera" category, the Vivo X300 Ultra significantly outperforms the Realme 15T (96/100 vs 32/100).
battery
In the "battery" category, the Vivo X300 Ultra notably outperforms the Realme 15T (85/100 vs 63/100).
portability
In the "portability" category, the Realme 15T notably outperforms the Vivo X300 Ultra (55/100 vs 39/100).
Frequently asked questions
Which is better: the Realme 15T or the Vivo X300 Ultra?
The Vivo X300 Ultra significantly outperforms the Realme 15T by 41 points (91/100 vs 50/100).
What is the rating of the Realme 15T and the Vivo X300 Ultra?
The Realme 15T has a MobileRank rating of 50/100, the Vivo X300 Ultra — 91/100.
Which has the better camera: the Realme 15T or the Vivo X300 Ultra?
The Vivo X300 Ultra leads on camera score (96/100 vs 32/100).
Which is more powerful: the Realme 15T or the Vivo X300 Ultra?
The Vivo X300 Ultra leads on performance (99/100 vs 45/100).
Should you choose the Realme 15T 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.