Vivo iQOO 15 Ultra vs Vivo X300 E
The Vivo iQOO 15 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite Gen 5, while the Vivo X300 E (2026) runs on the Qualcomm Snapdragon 8 Gen 5; launch prices were $799 and $651. 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 7200); the Vivo iQOO 15 Ultra is faster in AnTuTu (4,602,290 vs 2,886,527); the Vivo X300 E is noticeably lighter (200g vs 227g).
Profile comparison
Category scores
Vivo iQOO 15 Ultra
Vivo X300 E
What makes Vivo iQOO 15 Ultra better?
- Higher AnTuTu: 4602290 vs 2886527
- Better Geekbench Single: 3639 vs 2833
- Better Geekbench Multi: 11047 vs 9119
- Bigger battery: 7400 vs 7200 mAh
- Faster charging: 120W vs 90W
- Higher performance (99/100 vs 90/100)
- Better camera (78/100 vs 64/100)
- Longer battery life (92/100 vs 70/100)
- Better display (99/100 vs 94/100)
What makes Vivo X300 E better?
- Lighter: 200g vs 227g
- Cheaper at launch: $651 vs $799
- Better portability (61/100 vs 35/100)
Comparison verdict
Comparing the Vivo iQOO 15 Ultra vs the Vivo X300 E, the Vivo iQOO 15 Ultra scores 10 points higher (89/100 vs 79/100). In the "camera" category, the Vivo iQOO 15 Ultra leads (78/100 vs 64/100). In the "battery" category, the Vivo iQOO 15 Ultra leads (92/100 vs 70/100). Value score: Vivo iQOO 15 Ultra — 92/100, Vivo X300 E — 72/100; 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 90/100). In the "display" category, the Vivo iQOO 15 Ultra is a bit better (99/100 vs 94/100). In the "camera" category, the Vivo iQOO 15 Ultra is a bit better (78/100 vs 64/100). In the "battery" category, the Vivo iQOO 15 Ultra notably outperforms the Vivo X300 E (92/100 vs 70/100). In the "portability" category, the Vivo X300 E notably outperforms the Vivo iQOO 15 Ultra (61/100 vs 35/100).
Specs comparison
| Specification | Vivo iQOO 15 Ultra | Vivo X300 E | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite Gen 5 | Qualcomm Snapdragon 8 Gen 5 | |
| AnTuTu | 4602290 | 2886527 | |
| Geekbench Single | 3639 | 2833 | |
| Geekbench Multi | 11047 | 9119 | |
| Display | 6.8" LTPO AMOLED | 6.6" AMOLED | |
| Resolution | 1440x3168 | 1260x2750 | |
| Refresh rate | 144 Hz | 144 Hz | |
| Battery | 7400 mAh | 7200 mAh | |
| Charging | 120W | 90W | |
| Wireless charging | 50W | 0W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 50 MP | 8 MP | |
| Telephoto | 50 MP | 50 MP | |
| Front camera | 32 MP | 50 MP | |
| RAM | 12GB / 16GB / 24GB | 12GB | |
| Storage | 256GB / 512GB / 1TB | 256GB / 512GB | |
| OS | Android 16 | Android 16 | |
| Brightness (peak) | 8000 nits | 5000 nits | |
| NFC | yes | yes | |
| Protection | IP68 | IP68/IP69 | |
| Dimensions | 163.7×76.8×8.7 mm | 157.5×74.3×7.8 mm | |
| Weight | 227 g | 200 g | |
| Launch price | $799 | $651 |
Camera comparison
Vivo iQOO 15 Ultra
- Main: 50MP f/1.9
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Vivo X300 E
- Main: 50MP f/1.9
- Ultrawide: 8MP
- Telephoto: 50MP
- Front: 50MP
Display comparison
Vivo iQOO 15 Ultra
- 6.8" LTPO AMOLED
- Resolution: 1440x3168
- Refresh rate: 144 Hz
Vivo X300 E
- 6.6" AMOLED
- Resolution: 1260x2750
- Refresh rate: 144 Hz
Battery and charging
Vivo iQOO 15 Ultra
- 7400 mAh
- Wired: 120W
- Wireless: 50W
Vivo X300 E
- 7200 mAh
- Wired: 90W
- No wireless charging
Overall performance score
We compared Vivo iQOO 15 Ultra and Vivo X300 E, covering their specs and all relevant benchmarks.
Vivo iQOO 15 Ultra leads Vivo X300 E by 59.4% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $148. Vivo X300 E was $148 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Vivo iQOO 15 Ultra is a bit better (99/100 vs 90/100).
display
In the "display" category, the Vivo iQOO 15 Ultra is a bit better (99/100 vs 94/100).
camera
In the "camera" category, the Vivo iQOO 15 Ultra is a bit better (78/100 vs 64/100).
battery
In the "battery" category, the Vivo iQOO 15 Ultra notably outperforms the Vivo X300 E (92/100 vs 70/100).
portability
In the "portability" category, the Vivo X300 E notably outperforms the Vivo iQOO 15 Ultra (61/100 vs 35/100).
Frequently asked questions
Which is better: the Vivo iQOO 15 Ultra or the Vivo X300 E?
The Vivo iQOO 15 Ultra is noticeably better than the Vivo X300 E — the overall rating gap is 10 points.
What is the rating of the Vivo iQOO 15 Ultra and the Vivo X300 E?
The Vivo iQOO 15 Ultra has a MobileRank rating of 89/100, the Vivo X300 E — 79/100.
Which has the better camera: the Vivo iQOO 15 Ultra or the Vivo X300 E?
The Vivo iQOO 15 Ultra leads on camera score (78/100 vs 64/100).
Which is more powerful: the Vivo iQOO 15 Ultra or the Vivo X300 E?
The Vivo iQOO 15 Ultra leads on performance (99/100 vs 90/100).
Should you choose the Vivo iQOO 15 Ultra over the Vivo X300 E?
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 E is a better fit for gamers and power users.