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InnoReviews

iQOO 15 Ultra vs Vivo X300

WINNER
iQOO 15 Ultra
87.8Inno Score
VS
Vivo X300
81.4Inno Score
99.6Performance84
90.4Display73.5
65.5Camera78.1
90.2Battery87.2
86.7Features84
12 spec wins — iQOO 15 Ultra5 spec wins — Vivo X300

InnoReviews verdict

iQOO 15 Ultra wins this phone face-off, 87.8 to 81.4, pulling ahead mainly in display (+17) and performance (+16). Vivo X300 still makes sense if its price or standout specs fit your needs better.

Which would you pick?

Key differences

Reasons to pick the iQOO 15 Ultra

  • Stronger performance score: 100 vs 84
  • Stronger display score: 90 vs 74
  • Stronger battery score: 90 vs 87
  • 78% higher Peak brightness: 8,000 nits vs 4,500 nits
  • 66% higher AnTuTu 11 (Memory): 547,676 vs 329,857

Reasons to pick the Vivo X300

  • Stronger camera score: 78 vs 66
  • 300% higher Main camera: 200 MP vs 50 MP
  • 56% higher Front camera: 50 MP vs 32 MP
  • 16% lower weight: 190 g vs 227 g
  • Has eSIM — the other doesn't

Display

Display comparison: iQOO 15 Ultra versus Vivo X300
SpeciQOO 15 UltraVivo X300
Screen size6.85 ″+9%6.31 ″
Panel typeAMOLEDLTPO AMOLED
Resolution1440x31681216x2640
Pixel density508 ppi+10%461 ppi
Refresh rate144 Hz+20%120 Hz
Peak brightness8,000 nits+78%4,500 nits
Screen-to-body—90.1 %

Performance

Performance comparison: iQOO 15 Ultra versus Vivo X300
SpeciQOO 15 UltraVivo X300
ChipsetSnapdragon 8 Elite Gen 5MediaTek Dimensity 9500
AnTuTu 114,118,578+36%Top 1%3,037,992Top 20%
AnTuTu 11 (CPU)1,124,295+30%Top 2%864,875Top 22%
AnTuTu 11 (GPU)1,528,317+29%Top 1%1,185,719Top 14%
AnTuTu 11 (Memory)547,676+66%Top 1%329,857Top 41%
AnTuTu 11 (UX)918,290+40%Top 1%657,541Top 19%
AnTuTu 12—3,022,279Top 29%
Geekbench 6 (single)—3,446Top 7%
Geekbench 6 (multi)—9,843Top 8%
RAM (max)24 GB+50%16 GB
Storage options256GB/512GB/1TB256/512GB/1TB
Storage typeUFS 4.1UFS 4.1

Camera

Camera comparison: iQOO 15 Ultra versus Vivo X300
SpeciQOO 15 UltraVivo X300
Main camera50 MP200 MP+300%
Main aperturef/1.88f/1.68
Ultra-wide50 MP50 MP
Telephoto50 MP50 MP
Optical zoom3 x3 x
Max video8K@30fps4K@120fps
Front camera32 MP50 MP+56%
OISYesYes

Battery

Battery comparison: iQOO 15 Ultra versus Vivo X300
SpeciQOO 15 UltraVivo X300
Capacity7,400 mAh+23%6,040 mAh
Wired charging100 W+11%90 W
Wireless charging40 W40 W
Active use endurance—17.5 h

Design

Design comparison: iQOO 15 Ultra versus Vivo X300
SpeciQOO 15 UltraVivo X300
Weight227 g190 g+16%
Thickness8.7 mm8 mm+9%
IP ratingIP68/IP69IP68/IP69
Frame material—Aluminum

Connectivity

Connectivity comparison: iQOO 15 Ultra versus Vivo X300
SpeciQOO 15 UltraVivo X300
5GYesYes
Wi-FiWi-Fi 7Wi-Fi 7
Bluetooth6.05.4
NFCYesYes
USBUSB-C 3.2 Gen 1USB-C 3.2
eSIMNoYes

Software

Software comparison: iQOO 15 Ultra versus Vivo X300
SpeciQOO 15 UltraVivo X300
OS at launchAndroid 16 (OriginOS 6)Android 16 (OriginOS 6)
OS update pledge—5 years

Audio

Audio comparison: iQOO 15 Ultra versus Vivo X300
SpeciQOO 15 UltraVivo X300
Stereo speakersYesYes
3.5mm jackNoNo

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