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  3. iQOO 15 Ultra vs X300s

Vivo iQOO 15 Ultra vs Vivo X300s

What iQOO 15 Ultra does better (10) and where X300s wins (7) — every spec side by side.

Vivo iQOO 15 Ultra
Vivo · 2026iQOO 15 Ultra
9.7Score
10 advantages≈ $790
vs
Vivo X300s
Vivo · 2026X300s
9.7Score
7 advantages≈ $680
9.8Display9.5
9.8Performance9.6
9.4Camera9.6
9.7Battery9.6
9.4Features9.7
Dimensions

Size comparison

iQOO 15 UltraX300s
76.8 × 163.78.775.5 × 1628
iQOO 15 UltraX300sDifference
Height163.7 mm162 mm+1.7 mm
Width76.8 mm75.5 mm+1.3 mm
Thickness8.7 mm8 mm+0.7 mm
Weight227 g217 g+10 g

Drawn to the same scale from the official dimensions (front and side).

Why is iQOO 15 Ultra better than X300s?

  1. AnTuTu score4,602,290 vs 3,703,823+24%
  2. RAM24 GB vs 16 GB+50%
  3. Peak brightness8,000 nits vs 4,500 nits+78%
  4. Battery capacity7,400 mAh vs 7,100 mAh+4%
  5. Geekbench 6 (multi-core)11,366 vs 10,059+13%
  6. Wired charging100 W vs 90 W+11%
  7. Max video8K vs 4K
  8. Pixel density508 ppi vs 452 ppi+12%
  9. CPU frequency4.6 GHz vs 4.21 GHz+9%
  10. Resolution (width)1,440 px vs 1,260 px+14%

Why is X300s better than iQOO 15 Ultra?

  1. Main camera50 MP vs 200 MP4×
  2. 4K video frame rate60 fps vs 120 fps2×
  3. eSIMNo · iQOO 15 Ultra: Yes
  4. Weight227 g vs 217 g+5%
  5. Selfie camera32 MP vs 50 MP+56%
  6. Main camera aperturef/1.9 vs f/1.7+12%
  7. Thickness8.7 mm vs 8 mm+9%
Specifications

Side by side

Vivo iQOO 15 UltraVivo iQOO 15 Ultra≈ $7909.7
Vivo X300sVivo X300s≈ $6809.7
Design
Weight227 g217 g
Thickness8.7 mm8 mm
Height163.7 mm162 mm
Width76.8 mm75.5 mm
Frame—Aluminium
BackGlassGlass
Ingress protectionIP68IP68
Water resistance (IPx)IPx8IPx8
Glass protection—Reinforced Glass
ColoursBlack, SilverBlack, Silver, Purple, Green
Display
Screen size6.8″6.8″
PanelAMOLEDLTPO AMOLED
OLED panelYesYes
LTPO (adaptive 1–120 Hz)—Yes
Resolution (width)1,440 px1,260 px
Resolution (height)3,168 px2,800 px
Pixel density508 ppi452 ppi
Refresh rate144 Hz144 Hz
Peak brightness8,000 nits4,500 nits
Measured brightness1,534 nits—
Screen-to-body ratio90.7%91.1%
HDRYesYes
Performance
ChipsetQualcomm SM8850-AC Snapdragon 8 Elite Gen 5Mediatek Dimensity 9500
Chip makerQualcommMediaTek
Process3 nm3 nm
CPU cores88
CPU frequency4.6 GHz4.21 GHz
GPUAdreno 840Arm G1-Ultra
AnTuTu score4,602,2903,703,823
Geekbench 6 (multi-core)11,36610,059
Memory
RAM24 GB16 GB
Storage (max)1,024 GB1,024 GB
Storage (base)256 GB256 GB
Storage typeUFS 4.1UFS 4.1
Memory card slotNoNo
Camera
Main camera50 MP200 MP
Main camera aperturef/1.9f/1.7
Main sensor size1/1.56"1/1.4"
Rear cameras33
Optical stabilisationYesYes
Ultra-wide cameraYesYes
Telephoto cameraYesYes
Optical zoom3×3×
Max video8K4K
4K video frame rate60 fps120 fps
Selfie camera32 MP50 MP
4K selfie videoYesYes
Battery
Battery capacity7,400 mAh7,100 mAh
Battery typeSi/CSi/C
Wired charging100 W90 W
Charged in 30 min62%—
Wireless chargingYesYes
Wireless charging power40 W40 W
Reverse wireless chargingYesYes
Connectivity
5GYesYes
eSIMNoYes
Dual SIMYesYes
Wi-Fi standardWi-Fi 7Wi-Fi 7
Bluetooth5.45.4
NFCYesYes
USBUSB Type-C 3.2USB Type-C 3.2
USB version3.23.2
Video outputYesYes
Infrared portYesYes
Dual-band GPSYesYes
Satellite navigationGLONASS, GALILEO, BDS, QZSSGLONASS, GALILEO, BDS, QZSS, NavIC
Features
Stereo speakersYesYes
3.5 mm headphone jackNoNo
Fingerprint sensorUnder display, ultrasonicUnder display, ultrasonic
SensorsFingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compassFingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass
Software
OS at launchAndroid 16Android 16
PlatformAndroidAndroid
InterfaceOriginOS 6OriginOS 6
Major OS updates promised55

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