Realme C75x vs Vivo X300 Ultra
The Realme C75x (2025) runs on the MediaTek Helio G81 Ultra, 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 39/100 (a 52-point difference). Key differences: the Vivo X300 Ultra has the bigger battery (7000 mAh vs 5600); the main camera is 50 MP vs 200 MP; the Vivo X300 Ultra is faster in AnTuTu (4,247,433 vs 358,608); the Vivo X300 Ultra has NFC for contactless payments, the Realme C75x doesn't; the Realme C75x is noticeably lighter (196g vs 230g).
Profile comparison
Category scores
Realme C75x
Vivo X300 Ultra
What makes Realme C75x better?
- Lighter: 196g vs 230g
- Better portability (62/100 vs 39/100)
What makes Vivo X300 Ultra better?
- Higher AnTuTu: 4247433 vs 358608
- Better Geekbench Single: 3639 vs 432
- Better Geekbench Multi: 11047 vs 1416
- Bigger battery: 7000 vs 5600 mAh
- Faster charging: 100W vs 45W
- Better main camera: 200MP vs 50MP
- Higher performance (99/100 vs 30/100)
- Better camera (96/100 vs 30/100)
- Longer battery life (85/100 vs 55/100)
- Better display (89/100 vs 55/100)
Comparison verdict
Comparing the Realme C75x vs the Vivo X300 Ultra, the Vivo X300 Ultra scores 52 points higher (91/100 vs 39/100). In the "performance" category, the Vivo X300 Ultra leads (99/100 vs 30/100). 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 55/100). In the "performance" category, the Vivo X300 Ultra significantly outperforms the Realme C75x (99/100 vs 30/100). In the "display" category, the Vivo X300 Ultra significantly outperforms the Realme C75x (89/100 vs 55/100). In the "camera" category, the Vivo X300 Ultra significantly outperforms the Realme C75x (96/100 vs 30/100). In the "battery" category, the Vivo X300 Ultra significantly outperforms the Realme C75x (85/100 vs 55/100). In the "portability" category, the Realme C75x notably outperforms the Vivo X300 Ultra (62/100 vs 39/100).
Specs comparison
| Specification | Realme C75x | Vivo X300 Ultra | |
|---|---|---|---|
| Processor | MediaTek Helio G81 Ultra | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | 358608 | 4247433 | |
| Geekbench Single | 432 | 3639 | |
| Geekbench Multi | 1416 | 11047 | |
| Display | 6.7" IPS LCD | 6.8" LTPO OLED | |
| Resolution | 720x1604 | 3168x1440 | |
| Refresh rate | 120 Hz | 120 Hz | |
| Battery | 5600 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 | 5 MP | 32 MP | |
| RAM | 8GB | 12GB / 16GB | |
| Storage | 128GB | 256GB / 512GB / 1TB | |
| OS | Android 15, Realme UI 6.0 | Android 16 | |
| Brightness (peak) | 625 nits | — | |
| NFC | no | yes | |
| Protection | IP68 | IP69 | |
| Dimensions | 165.7×76.2×8.0 mm | 163.0×76.8×8.2 mm | |
| Weight | 196 g | 230 g | |
| Launch price | — | $950 |
Camera comparison
Realme C75x
- Main: 50MP f/1.8
- Front: 5MP
Vivo X300 Ultra
- Main: 200MP f/1.6
- Ultrawide: 50MP
- Telephoto: 200MP
- Front: 32MP
Display comparison
Realme C75x
- 6.7" IPS LCD
- Resolution: 720x1604
- Refresh rate: 120 Hz
Vivo X300 Ultra
- 6.8" LTPO OLED
- Resolution: 3168x1440
- Refresh rate: 120 Hz
Battery and charging
Realme C75x
- 5600 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
Overall performance score
We compared Realme C75x and Vivo X300 Ultra, covering their specs and all relevant benchmarks.
Vivo X300 Ultra leads Realme C75x by 91.6% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Realme C75x
Price unknownDetailed category analysis
performance
In the "performance" category, the Vivo X300 Ultra significantly outperforms the Realme C75x (99/100 vs 30/100).
display
In the "display" category, the Vivo X300 Ultra significantly outperforms the Realme C75x (89/100 vs 55/100).
camera
In the "camera" category, the Vivo X300 Ultra significantly outperforms the Realme C75x (96/100 vs 30/100).
battery
In the "battery" category, the Vivo X300 Ultra significantly outperforms the Realme C75x (85/100 vs 55/100).
portability
In the "portability" category, the Realme C75x notably outperforms the Vivo X300 Ultra (62/100 vs 39/100).
Frequently asked questions
Which is better: the Realme C75x or the Vivo X300 Ultra?
The Vivo X300 Ultra significantly outperforms the Realme C75x by 52 points (91/100 vs 39/100).
What is the rating of the Realme C75x and the Vivo X300 Ultra?
The Realme C75x has a MobileRank rating of 39/100, the Vivo X300 Ultra — 91/100.
Which has the better camera: the Realme C75x or the Vivo X300 Ultra?
The Vivo X300 Ultra leads on camera score (96/100 vs 30/100).
Which is more powerful: the Realme C75x or the Vivo X300 Ultra?
The Vivo X300 Ultra leads on performance (99/100 vs 30/100).
Should you choose the Realme C75x 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.