Realme C100i vs Vivo X300 Ultra
The Realme C100i (2026) runs on the Unisoc T7250, while the Vivo X300 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite Gen 5; launch prices were $119 and $950. By overall MobileRank rating, the Vivo X300 Ultra leads — 91/100 vs 34/100 (a 57-point difference). Key differences: the main camera is 8 MP vs 200 MP; the Vivo X300 Ultra has NFC for contactless payments, the Realme C100i doesn't; the Realme C100i is noticeably lighter (208g vs 230g).
Realme C100i
Vivo X300 Ultra
- Lighter: 208g vs 230g
- Cheaper at launch: $119 vs $950
- Better portability (50/100 vs 39/100)
- Better Geekbench Single: 3640 vs 600
- Better Geekbench Multi: 11033 vs 1800
- Faster charging: 100W vs 15W
- Better main camera: 200MP vs 8MP
- Higher performance (99/100 vs 32/100)
- Better camera (96/100 vs 10/100)
- Longer battery life (85/100 vs 55/100)
- Better display (89/100 vs 55/100)
Comparing the Realme C100i vs the Vivo X300 Ultra, the Vivo X300 Ultra scores 57 points higher (91/100 vs 34/100). In the "performance" category, the Vivo X300 Ultra leads (99/100 vs 32/100). In the "camera" category, the Vivo X300 Ultra leads (96/100 vs 10/100). In the "battery" category, the Vivo X300 Ultra leads (85/100 vs 55/100). Value score: Realme C100i — 50/100, 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 C100i (99/100 vs 32/100). In the "display" category, the Vivo X300 Ultra significantly outperforms the Realme C100i (89/100 vs 55/100). In the "camera" category, the Vivo X300 Ultra significantly outperforms the Realme C100i (96/100 vs 10/100). In the "battery" category, the Vivo X300 Ultra significantly outperforms the Realme C100i (85/100 vs 55/100). In the "portability" category, the Realme C100i is a bit better (50/100 vs 39/100).
| Specification | Realme C100i | Vivo X300 Ultra | |
|---|---|---|---|
| Processor | Unisoc T7250 | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | — | 4247433 | |
| Geekbench Single | 600 | 3640 | |
| Geekbench Multi | 1800 | 11033 | |
| Display | 6.8" IPS LCD | 6.8" LTPO OLED | |
| Resolution | 720x1570 | 3168x1440 | |
| Refresh rate | 120 Hz | 120 Hz | |
| Battery | 7000 mAh | 7000 mAh | |
| Charging | 15W | 100W | |
| Wireless charging | 0W | 40W | |
| DXOMark (camera) | — | 170 | |
| Main camera | 8 MP | 200 MP | |
| Ultrawide | 0 MP | 50 MP | |
| Telephoto | 0 MP | 200 MP | |
| Front camera | 5 MP | 32 MP | |
| RAM | 4GB / 6GB | 12GB / 16GB | |
| Storage | 64GB / 128GB / 256GB | 256GB / 512GB / 1TB | |
| OS | Android 16 | Android 16 | |
| NFC | no | yes | |
| Protection | IP64 | IP69 | |
| Dimensions | 166.5×78.2×8.4 mm | 163.0×76.8×8.2 mm | |
| Weight | 208 g | 230 g | |
| Launch price | $119 | $950 |
Realme C100i
- Main: 8MP f/f/2.0
- Front: 5MP
Vivo X300 Ultra
- Main: 200MP f/f/1.6
- Ultrawide: 50MP
- Telephoto: 200MP
- Front: 32MP
Realme C100i
- 6.8" IPS LCD
- Resolution: 720x1570
- Refresh rate: 120 Hz
Vivo X300 Ultra
- 6.8" LTPO OLED
- Resolution: 3168x1440
- Refresh rate: 120 Hz
Realme C100i
- 7000 mAh
- Wired: 15W
- No wireless charging
Vivo X300 Ultra
- 7000 mAh
- NanoReview test: web browsing 10:18 hrs, total 29:11 hrs
- Wired: 100W
- Wireless: 40W
Launch price difference: $831. Realme C100i was $831 cheaper at launch.
performance
In the "performance" category, the Vivo X300 Ultra significantly outperforms the Realme C100i (99/100 vs 32/100).
display
In the "display" category, the Vivo X300 Ultra significantly outperforms the Realme C100i (89/100 vs 55/100).
camera
In the "camera" category, the Vivo X300 Ultra significantly outperforms the Realme C100i (96/100 vs 10/100).
battery
In the "battery" category, the Vivo X300 Ultra significantly outperforms the Realme C100i (85/100 vs 55/100).
portability
In the "portability" category, the Realme C100i is a bit better (50/100 vs 39/100).
Which is better: the Realme C100i or the Vivo X300 Ultra?
The Vivo X300 Ultra significantly outperforms the Realme C100i by 57 points (91/100 vs 34/100).
What is the rating of the Realme C100i and the Vivo X300 Ultra?
The Realme C100i has a MobileRank rating of 34/100, the Vivo X300 Ultra — 91/100.
Which has the better camera: the Realme C100i or the Vivo X300 Ultra?
The Vivo X300 Ultra leads on camera score (96/100 vs 10/100).
Which is more powerful: the Realme C100i or the Vivo X300 Ultra?
The Vivo X300 Ultra leads on performance (99/100 vs 32/100).
Should you choose the Realme C100i over the Vivo X300 Ultra?
The Realme C100i is a better fit for everyday use. 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.