Vivo iQOO 15 Ultra vs Vivo X300
The Vivo iQOO 15 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite Gen 5, while the Vivo X300 (2024) runs on the MediaTek Dimensity 9300; launch prices were $799 and $499. By overall MobileRank rating, the Vivo iQOO 15 Ultra leads — 89/100 vs 79/100 (a 10-point difference). Key differences: the Vivo iQOO 15 Ultra has the bigger battery (7400 mAh vs 5000); the Vivo iQOO 15 Ultra is faster in AnTuTu (4,602,290 vs 3,037,992); the Vivo X300 is noticeably lighter (206g vs 227g).
Profile comparison
Category scores
Vivo iQOO 15 Ultra
Vivo X300
What makes Vivo iQOO 15 Ultra better?
- Higher AnTuTu: 4602290 vs 3037992
- Better Geekbench Single: 3639 vs 2186
- Better Geekbench Multi: 11047 vs 7422
- Bigger battery: 7400 vs 5000 mAh
- Faster charging: 120W vs 80W
- Higher refresh rate: 144Hz vs 120Hz
- Faster wireless charging: 50W vs 40W
- Higher performance (99/100 vs 86/100)
- Longer battery life (92/100 vs 69/100)
- Better display (99/100 vs 84/100)
What makes Vivo X300 better?
- Lighter: 206g vs 227g
- Cheaper at launch: $499 vs $799
- Better portability (55/100 vs 35/100)
Comparison verdict
Comparing the Vivo iQOO 15 Ultra vs the Vivo X300, the Vivo iQOO 15 Ultra scores 10 points higher (89/100 vs 79/100). In the "performance" category, the Vivo iQOO 15 Ultra leads (99/100 vs 86/100). In the "battery" category, the Vivo iQOO 15 Ultra leads (92/100 vs 69/100). Value score: Vivo iQOO 15 Ultra — 92/100, Vivo X300 — 80/100; 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 iQOO 15 Ultra is a bit better (99/100 vs 86/100). In the "display" category, the Vivo iQOO 15 Ultra notably outperforms the Vivo X300 (99/100 vs 84/100). In the "camera" category, both devices are on the same level — 78/100. In the "battery" category, the Vivo iQOO 15 Ultra notably outperforms the Vivo X300 (92/100 vs 69/100). In the "portability" category, the Vivo X300 notably outperforms the Vivo iQOO 15 Ultra (55/100 vs 35/100).
Specs comparison
| Specification | Vivo iQOO 15 Ultra | Vivo X300 | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite Gen 5 | MediaTek Dimensity 9300 | |
| AnTuTu | 4602290 | 3037992 | |
| Geekbench Single | 3639 | 2186 | |
| Geekbench Multi | 11047 | 7422 | |
| Display | 6.8" LTPO AMOLED | 6.8" AMOLED | |
| Resolution | 1440x3168 | 2800x1260 | |
| Refresh rate | 144 Hz | 120 Hz | |
| Battery | 7400 mAh | 5000 mAh | |
| Charging | 120W | 80W | |
| Wireless charging | 50W | 40W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 50 MP | 50 MP | |
| Telephoto | 50 MP | 50 MP | |
| Front camera | 32 MP | 32 MP | |
| RAM | 12GB / 16GB / 24GB | 12GB / 16GB | |
| Storage | 256GB / 512GB / 1TB | 256GB / 512GB | |
| OS | Android 16 | Android 14 | |
| Brightness (peak) | 8000 nits | 4500 nits | |
| NFC | yes | yes | |
| Protection | IP68 | IP68 | |
| Dimensions | 163.7×76.8×8.7 mm | 150.6×71.9×8.0 mm | |
| Weight | 227 g | 206 g | |
| Launch price | $799 | $499 |
Camera comparison
Vivo iQOO 15 Ultra
- Main: 50MP f/1.9
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Vivo X300
- Main: 50MP f/1.57
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Display comparison
Vivo iQOO 15 Ultra
- 6.8" LTPO AMOLED
- Resolution: 1440x3168
- Refresh rate: 144 Hz
Vivo X300
- 6.8" AMOLED
- Resolution: 2800x1260
- Refresh rate: 120 Hz
Battery and charging
Vivo iQOO 15 Ultra
- 7400 mAh
- Wired: 120W
- Wireless: 50W
Vivo X300
- 5000 mAh
- Wired: 80W
- Wireless: 40W
Overall performance score
We compared Vivo iQOO 15 Ultra and Vivo X300, covering their specs and all relevant benchmarks.
Vivo iQOO 15 Ultra leads Vivo X300 by 51.5% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $300. Vivo X300 was $300 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Vivo iQOO 15 Ultra is a bit better (99/100 vs 86/100).
display
In the "display" category, the Vivo iQOO 15 Ultra notably outperforms the Vivo X300 (99/100 vs 84/100).
camera
In the "camera" category, both devices are on the same level — 78/100.
battery
In the "battery" category, the Vivo iQOO 15 Ultra notably outperforms the Vivo X300 (92/100 vs 69/100).
portability
In the "portability" category, the Vivo X300 notably outperforms the Vivo iQOO 15 Ultra (55/100 vs 35/100).
Frequently asked questions
Which is better: the Vivo iQOO 15 Ultra or the Vivo X300?
The Vivo iQOO 15 Ultra is noticeably better than the Vivo X300 — the overall rating gap is 10 points.
What is the rating of the Vivo iQOO 15 Ultra and the Vivo X300?
The Vivo iQOO 15 Ultra has a MobileRank rating of 89/100, the Vivo X300 — 79/100.
Which is more powerful: the Vivo iQOO 15 Ultra or the Vivo X300?
The Vivo iQOO 15 Ultra leads on performance (99/100 vs 86/100).
Should you choose the Vivo iQOO 15 Ultra over the Vivo X300?
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 is a better fit for gamers and power users, budget-conscious buyers.