Compare Xiaomi Watch S4 vs Xiaomi 15 Ultra
| Xiaomi Watch S4 Choose another device | Xiaomi 15 Ultra Choose another device | |
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Launch
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| Version | October 2024 | February 2025. |
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Network
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| Technology | 4G | 5G |
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Body
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| Dimensions | 47.3 x 47.3 x 12 mm (1.86 x 1.86 x 0.47 in) | 161.3 x 75.3 x 9.4 mm (6.35 x 2.96 x 0.37 in) |
| Weight | 44.5 g (1.59 oz) | 226 g or 229 g |
| SIM | eSIM | Nano-SIM + Nano-SIM or Nano-SIM + Nano-SIM + eSIM + eSIM (max 2 at a time) |
| Design | Aluminum alloy frame, stainless steel bezel | Glass front, glass-fiber back or silicone polymer back (eco leather), aluminum frame |
| Others | Waterproof (5ATM) | IP68 dust tight and water resistant |
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Display
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| Type | AMOLED | LTPO AMOLED, 68B colors, 120Hz, Dolby Vision, HDR10+ |
| Size | 1.43 inches | 6.73 inches |
| Resolution | 466 x 466 pixels | 1440 x 3200 pixels |
| Protection | Scratch/drop-proof glass | Xiaomi Shield Glass 2.0 |
| Various | ||
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Platform
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| Operating System | HyperOS 2 | Android 15, HyperOS 2 |
| Chipset | Qualcomm SM8750-AB Snapdragon 8 Elite (3 nm) | |
| CPU | Octa-core (2x4.32 GHz Oryon V2 Phoenix L + 6x3.53 GHz Oryon V2 Phoenix M) | |
| GPU | Adreno 830 | |
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Memory
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| Card Slot | No | No |
| Internal | 256GB 12GB RAM, 512GB 16GB RAM, 1TB 16GB RAM | |
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Camera
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| Primary | No | 50 MP (f/1.6)(Optical Image Stabilization) + 50 MP (3x optical zoom) + 200 MP (4.3x optical zoom) + 50 MP (115Ëš) + TOF 3D (depth) |
| Features | Laser AF, color spectrum sensor, Leica lenses, Dual-LED flash, HDR, panorama, 67mm filter ring holder (optional) | |
| Video | 8K@30fps, 4K@120fps, 1080p@1920fps | |
| Selfie | 32 MP (4K@60fps, 1080p@60fps) | |
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Sound
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| Loudspeaker | Yes | Yes, with stereo speakers |
| 3.5mm Jack | No | No |
| Extra | 24-bit/192kHz Hi-Res & Hi-Res Wireless audio | |
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Comms
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| Wifi | No | a/b/g/n/ac/6e/7, dual-band or tri-band |
| Bluetooth | 5.3 | 6.0 |
| GPS | Yes | Yes |
| NFC | Yes | Yes |
| Infrared | Yes | |
| Radio | No | No |
| USB | No | USB Type-C 3.2 Gen 2, DisplayPort |
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Features
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| Sensors | Accelerometer, gyro, compass, barometer, heart rate, SpO2 | Fingerprint (under display, ultrasonic), accelerometer, proximity, gyro, compass, barometer |
| Miscellaneous | Two-way satellite communication | |
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Battery
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| Battery type | 486 mAh | 6000 mAh |
| Charging | 90W wired, 80W wireless, 10W reverse wireless | |
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Misc
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| Colors | Black, Silver, Rainbow | Black, White, Silver Chrome, Green |
| Models | M2424W1, M2425W1 | |
| Inside the box | Documents, SIM ejection tool, Protection case, 90W power adapter, USB C cable | |
| Price | 140 USD | 900 USD |
| Xiaomi Watch S4: More information Choose another device | Xiaomi 15 Ultra: More information Choose another device | |
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