Vivo iQOO 15 Ultra vs Vivo X300 Ultra
The Vivo iQOO 15 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite Gen 5, while the Vivo X300 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite Gen 5; estimated prices are $799 and $950. By overall MobileRank rating, the Vivo X300 Ultra leads — 87/100 vs 84/100 (a 3-point difference). Key differences: the Vivo iQOO 15 Ultra has the bigger battery (7400 mAh vs 7000); the main camera is 50 MP vs 200 MP; the Vivo iQOO 15 Ultra is faster in AnTuTu (4,602,290 vs 4,247,433).
Vivo iQOO 15 Ultra
Vivo X300 Ultra
- Higher AnTuTu: 4602290 vs 4247433
- Bigger battery: 7400 vs 7000 mAh
- Faster charging: 120W vs 100W
- Higher refresh rate: 144Hz vs 120Hz
- Faster wireless charging: 50W vs 40W
- Lighter: 227g vs 230g
- Cheaper: $799 vs $950
- Higher performance (97/100 vs 96/100)
- Longer battery life (86/100 vs 77/100)
- Better design/ergonomics (16/100 vs 12/100)
- Better value for money (55/100 vs 44/100)
- Better main camera: 200MP vs 50MP
- Better camera (96/100 vs 74/100)
Comparing the Vivo iQOO 15 Ultra vs the Vivo X300 Ultra, the Vivo X300 Ultra scores 3 points higher (87/100 vs 84/100). In the "camera" category, the Vivo X300 Ultra leads (96/100 vs 74/100). In the "value for money" category, the Vivo iQOO 15 Ultra leads (55/100 vs 44/100). In the "performance" category, the Vivo iQOO 15 Ultra and the Vivo X300 Ultra are nearly equal (97/100 vs 96/100). In the "display" category, both devices are on the same level — 100/100. In the "camera" category, the Vivo X300 Ultra notably outperforms the Vivo iQOO 15 Ultra (96/100 vs 74/100). In the "battery" category, the Vivo iQOO 15 Ultra is a bit better (86/100 vs 77/100). In the "design" category, the Vivo iQOO 15 Ultra and the Vivo X300 Ultra are nearly equal (16/100 vs 12/100). In the "value for money" category, the Vivo iQOO 15 Ultra is a bit better (55/100 vs 44/100).
| Specification | Vivo iQOO 15 Ultra | Vivo X300 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite Gen 5 | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | 4602290 | 4247433 | |
| Geekbench Single | 3640 | 3640 | |
| Geekbench Multi | 11033 | 11033 | |
| Display | 6.8" LTPO AMOLED | 6.8" LTPO OLED | |
| Resolution | 1440x3168 | 3168x1440 | |
| Refresh rate | 144 Hz | 120 Hz | |
| Battery | 7400 mAh | 7000 mAh | |
| Charging | 120W | 100W | |
| Wireless charging | 50W | 40W | |
| DXOMark (camera) | — | 170 | |
| Main camera | 50 MP | 200 MP | |
| Ultrawide | 50 MP | 50 MP | |
| Telephoto | 50 MP | 200 MP | |
| Front camera | 32 MP | 32 MP | |
| RAM | 12GB / 16GB / 24GB | 12GB / 16GB | |
| Storage | 256GB / 512GB / 1TB | 256GB / 512GB / 1TB | |
| OS | Android 16 | Android 16 | |
| Brightness (peak) | 8000 nits | — | |
| NFC | yes | yes | |
| Protection | IP68 | IP69 | |
| Dimensions | 163.7×76.8×8.7 mm | 163.0×76.8×8.2 mm | |
| Weight | 227 g | 230 g | |
| Price | $799 | $950 |
Vivo iQOO 15 Ultra
- Main: 50MP f/f/1.9
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Vivo X300 Ultra
- Main: 200MP f/f/1.6
- Ultrawide: 50MP
- Telephoto: 200MP
- Front: 32MP
Vivo iQOO 15 Ultra
- 6.8" LTPO AMOLED
- Resolution: 1440x3168
- Refresh rate: 144 Hz
Vivo X300 Ultra
- 6.8" LTPO OLED
- Resolution: 3168x1440
- Refresh rate: 120 Hz
Vivo iQOO 15 Ultra
- 7400 mAh
- Wired: 120W
- Wireless: 50W
Vivo X300 Ultra
- 7000 mAh
- NanoReview test: web browsing 10:18 hrs, total 29:11 hrs
- Wired: 100W
- Wireless: 40W
We compared Vivo iQOO 15 Ultra and Vivo X300 Ultra, covering their specs and all relevant benchmarks.
Vivo iQOO 15 Ultra leads Vivo X300 Ultra by 8.4% in our overall performance rating.
Price difference: $151. Vivo iQOO 15 Ultra is cheaper by $151.
performance
In the "performance" category, the Vivo iQOO 15 Ultra and the Vivo X300 Ultra are nearly equal (97/100 vs 96/100).
display
In the "display" category, both devices are on the same level — 100/100.
camera
In the "camera" category, the Vivo X300 Ultra notably outperforms the Vivo iQOO 15 Ultra (96/100 vs 74/100).
battery
In the "battery" category, the Vivo iQOO 15 Ultra is a bit better (86/100 vs 77/100).
design
In the "design" category, the Vivo iQOO 15 Ultra and the Vivo X300 Ultra are nearly equal (16/100 vs 12/100).
value for money
In the "value for money" category, the Vivo iQOO 15 Ultra is a bit better (55/100 vs 44/100).
Which is better: the Vivo iQOO 15 Ultra or the Vivo X300 Ultra?
The Vivo X300 Ultra edges out the Vivo iQOO 15 Ultra by just 3 points — the two devices are very close in overall level.
What is the rating of the Vivo iQOO 15 Ultra and the Vivo X300 Ultra?
The Vivo iQOO 15 Ultra has a MobileRank rating of 84/100, the Vivo X300 Ultra — 87/100.
Which has the better camera: the Vivo iQOO 15 Ultra or the Vivo X300 Ultra?
The Vivo X300 Ultra leads on camera score (96/100 vs 74/100).
Should you choose the Vivo iQOO 15 Ultra over the Vivo X300 Ultra?
The Vivo iQOO 15 Ultra is a better fit for gamers and power users, 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.