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; launch prices were $799 and $950. By overall MobileRank rating, the Vivo X300 Ultra leads — 91/100 vs 89/100 (a 2-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).
Profile comparison
Category scores
Vivo iQOO 15 Ultra
Vivo X300 Ultra
What makes Vivo iQOO 15 Ultra better?
- 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 at launch: $799 vs $950
- Longer battery life (92/100 vs 85/100)
- Better display (99/100 vs 89/100)
What makes Vivo X300 Ultra better?
- Better main camera: 200MP vs 50MP
- Better camera (96/100 vs 78/100)
- Better portability (39/100 vs 35/100)
Comparison verdict
Comparing the Vivo iQOO 15 Ultra vs the Vivo X300 Ultra, the Vivo X300 Ultra scores 2 points higher (91/100 vs 89/100). In the "camera" category, the Vivo X300 Ultra leads (96/100 vs 78/100). Value score: Vivo iQOO 15 Ultra — 92/100, 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, both devices are on the same level — 99/100. In the "display" category, the Vivo iQOO 15 Ultra is a bit better (99/100 vs 89/100). In the "camera" category, the Vivo X300 Ultra notably outperforms the Vivo iQOO 15 Ultra (96/100 vs 78/100). In the "battery" category, the Vivo iQOO 15 Ultra is a bit better (92/100 vs 85/100). In the "portability" category, the Vivo X300 Ultra and the Vivo iQOO 15 Ultra are nearly equal (39/100 vs 35/100).
Specs comparison
| 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 | 3639 | 3639 | |
| Geekbench Multi | 11047 | 11047 | |
| 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 | |
| Launch price | $799 | $950 |
Camera comparison
Vivo iQOO 15 Ultra
- Main: 50MP f/1.9
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Vivo X300 Ultra
- Main: 200MP f/1.6
- Ultrawide: 50MP
- Telephoto: 200MP
- Front: 32MP
Display comparison
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
Battery and charging
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
Overall performance score
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.
Benchmarks
Launch prices and where to check today's
Launch price difference: $151. Vivo iQOO 15 Ultra was $151 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, both devices are on the same level — 99/100.
display
In the "display" category, the Vivo iQOO 15 Ultra is a bit better (99/100 vs 89/100).
camera
In the "camera" category, the Vivo X300 Ultra notably outperforms the Vivo iQOO 15 Ultra (96/100 vs 78/100).
battery
In the "battery" category, the Vivo iQOO 15 Ultra is a bit better (92/100 vs 85/100).
portability
In the "portability" category, the Vivo X300 Ultra and the Vivo iQOO 15 Ultra are nearly equal (39/100 vs 35/100).
Frequently asked questions
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 2 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 89/100, the Vivo X300 Ultra — 91/100.
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 78/100).
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, budget-conscious buyers. 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.