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- X300 Pro vs 15 Ultra
Vivo X300 Pro vs Xiaomi 15 Ultra
What X300 Pro does better (11) and where 15 Ultra wins (12) — every spec side by side.
Dimensions
Size comparison
X300 Pro15 Ultra
| X300 Pro | 15 Ultra | Difference | |
|---|---|---|---|
| Height | 161.2 mm | 161.3 mm | −0.1 mm |
| Width | 75.5 mm | 75.3 mm | +0.2 mm |
| Thickness | 8 mm | 9.4 mm | −1.4 mm |
| Weight | 226 g | 226 g | = |
Drawn to the same scale from the official dimensions (front and side).
Why is X300 Pro better than 15 Ultra?
- Battery capacity6,510 mAh vs 5,410 mAh+20%
- Peak brightness4,500 nits vs 3,200 nits+41%
- Geekbench 6 (multi-core)10,264 vs 9,710+6%
- Measured brightness2,113 nits vs 1,588 nits+33%
- 3DMark Wild Life Extreme7,263 vs 5,626+29%
- Major OS updates promised5 vs 4+25%
- Drop resistance classB vs C
- Selfie camera50 MP vs 32 MP+56%
- Battery charge cycles1,200 vs 1,000+20%
- Thickness8 mm vs 9.4 mm+18%
- Screen-to-body ratio91.6% vs 89.7%+2%
Why is 15 Ultra better than X300 Pro?
- Active use (test)12.8 h vs 16.2 h+27%
- Rear cameras2 vs 42×
- Wireless charging power40 W vs 80 W2×
- Energy classB vs A
- Optical zoom3.7× vs 4.3×+16%
- Pixel density452 ppi vs 522 ppi+15%
- CPU frequency4.21 GHz vs 4.32 GHz+3%
- Endurance per cycle48 h vs 59 h+22%
- Resolution (width)1,260 px vs 1,440 px+14%
- Bluetooth5.4 vs 6+11%
- Charged in 30 min69% vs 72%+4%
- Loudspeaker loudness-24.8 LUFS vs -24.1 LUFS+-3%
Specifications
Side by side
| Design | ||
| Weight | 226 g | 226 g |
| Thickness | 8 mm | 9.4 mm |
| Height | 161.2 mm | 161.3 mm |
| Width | 75.5 mm | 75.3 mm |
| Frame | Aluminium | Aluminium |
| Back | Glass | Silicone polymer |
| Ingress protection | IP68 | IP68 |
| Water resistance (IPx) | IPx8 | IPx8 |
| Glass protection | Armor Glass | Xiaomi Shield Glass 2.0 |
| Colours | Phantom Black, Mist Blue, Dune Brown, Cloud White | Black, White, Silver Chrome, Green |
| Display | ||
| Screen size | 6.8″ | 6.7″ |
| Panel | LTPO AMOLED | LTPO AMOLED |
| OLED panel | Yes | Yes |
| LTPO (adaptive 1–120 Hz) | Yes | Yes |
| Resolution (width) | 1,260 px | 1,440 px |
| Resolution (height) | 2,800 px | 3,200 px |
| Pixel density | 452 ppi | 522 ppi |
| Refresh rate | 120 Hz | 120 Hz |
| Peak brightness | 4,500 nits | 3,200 nits |
| Measured brightness | 2,113 nits | 1,588 nits |
| Screen-to-body ratio | 91.6% | 89.7% |
| HDR | Yes | Yes |
| Performance | ||
| Chipset | Mediatek Dimensity 9500 | Qualcomm SM8750-AB Snapdragon 8 Elite |
| Chip maker | MediaTek | Qualcomm |
| Process | 3 nm | 3 nm |
| CPU cores | 8 | 8 |
| CPU frequency | 4.21 GHz | 4.32 GHz |
| GPU | Arm G1-Ultra | Adreno 830 |
| AnTuTu score | 2,982,875 | 3,030,376 |
| Geekbench 6 (multi-core) | 10,264 | 9,710 |
| 3DMark Wild Life Extreme | 7,263 | 5,626 |
| Memory | ||
| RAM | 16 GB | 16 GB |
| Storage (max) | 1,024 GB | 1,024 GB |
| Storage (base) | 256 GB | 256 GB |
| Storage type | UFS 4.1 | UFS 4.1 |
| Memory card slot | No | No |
| Camera | ||
| Main camera | 50 MP | 50 MP |
| Main camera aperture | f/1.6 | f/1.6 |
| Main sensor size | 1/1.28" | 1" |
| Rear cameras | 2 | 4 |
| Optical stabilisation | Yes | Yes |
| Ultra-wide camera | Yes | Yes |
| Telephoto camera | Yes | Yes |
| Optical zoom | 3.7× | 4.3× |
| Max video | 8K | 8K |
| 4K video frame rate | 120 fps | 120 fps |
| Selfie camera | 50 MP | 32 MP |
| 4K selfie video | Yes | Yes |
| Battery | ||
| Battery capacity | 6,510 mAh | 5,410 mAh |
| Battery type | Si/C | Si/C |
| Active use (test) | 12.8 h | 16.2 h |
| Wired charging | 90 W | 90 W |
| Charged in 30 min | 69% | 72% |
| Wireless charging | Yes | Yes |
| Wireless charging power | 40 W | 80 W |
| Reverse wireless charging | Yes | Yes |
| Connectivity | ||
| 5G | Yes | Yes |
| eSIM | Yes | Yes |
| Dual SIM | Yes | Yes |
| Wi-Fi standard | Wi-Fi 7 | Wi-Fi 7 |
| Bluetooth | 5.4 | 6 |
| NFC | Yes | Yes |
| USB | USB Type-C 3.2 | USB Type-C 3.2 Gen 2 |
| USB version | 3.2 | 3.2 |
| Video output | Yes | Yes |
| Satellite messaging | Yes | Yes |
| Infrared port | Yes | Yes |
| Dual-band GPS | Yes | Yes |
| Satellite navigation | GLONASS, GALILEO, BDS, QZSS, NavIC | GLONASS, GALILEO, BDS, QZSS, NavIC |
| Features | ||
| Stereo speakers | Yes | Yes |
| 3.5 mm headphone jack | No | No |
| Loudspeaker loudness | -24.8 LUFS | -24.1 LUFS |
| Fingerprint sensor | Under display, ultrasonic | Under display, ultrasonic |
| Barometer | — | Yes |
| Sensors | Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass | Fingerprint (under display, ultrasonic), accelerometer, proximity, gyro, compass, barometer |
| SAR (head) | — | 1 W/kg |
| Software | ||
| OS at launch | Android 16 | Android 15 |
| Platform | Android | Android |
| Interface | OriginOS 6 | HyperOS 3 |
| Major OS updates promised | 5 | 4 |
| EU label | ||
| Energy class | B | A |
| Battery charge cycles | 1,200 | 1,000 |
| Endurance per cycle | 48 h | 59 h |
| Repairability class | C | C |
| Drop resistance class | B | C |
