Apple iPhone X vs Xiaomi 15 Ultra
The Verdict
These phones represent different eras of flagship design, separated by years of advancement. Apple's iPhone X delivers a refined 5.8-inch OLED experience with a capable dual camera setup (12 MP main, 2x optical zoom) and strong iOS integration, but its 2716 mAh battery and 3 GB RAM feel dated. Xiaomi's 15 Ultra is substantially more capable across nearly every dimension: a larger 6.73-inch display with 3200x1440 resolution and exceptional 3200-nit brightness, a 5810 mAh battery supporting 90W charging, and a versatile camera system featuring a 50 MP main sensor with 1-inch optics, 200 MP 5x periscope zoom, and 8K video recording. Performance-wise, Snapdragon 8 Elite with 16 GB RAM vastly outpaces the A11 Bionic and 3 GB configuration. The 15 Ultra adds 5G, USB-C 3.2, Wi-Fi 7, and modern durability (IP68, Gorilla Glass Victus 2). While both launched at identical prices, the Xiaomi represents dramatically superior value and modern technology. iPhone X appeals only to loyal Apple users seeking a compact device or those prioritizing ecosystem continuity. The 15 Ultra is the obvious choice for most buyers seeking contemporary features and capability.
Who Should Buy
Buy the Apple iPhone X if…
- →Revolutionary edge-to-edge OLED display design
- →Face ID introduced biometric innovation
- →Wireless charging support
Buy the Xiaomi 15 Ultra if…
- →200MP periscope telephoto with 5x optical zoom rivals Galaxy S25 Ultra
- →1-inch main sensor with Leica optics produces stunning photos
- →Titanium frame gives a premium, durable build
Category Scores
Pros & Cons
Apple iPhone X
Pros
- Revolutionary edge-to-edge OLED display design
- Face ID introduced biometric innovation
- Wireless charging support
- Premium stainless steel and glass build
- Animoji with TrueDepth camera
Cons
- First-gen Face ID was slower than Touch ID
- Notch design was polarizing
- $999 starting price was unprecedented
- No headphone jack or adapter in box
- Fragile all-glass construction
Xiaomi 15 Ultra
Pros
- 200MP periscope telephoto with 5x optical zoom rivals Galaxy S25 Ultra
- 1-inch main sensor with Leica optics produces stunning photos
- Titanium frame gives a premium, durable build
- 4K@120fps video recording is industry-leading
- 90W fast charging and 50W wireless on a huge 5810 mAh battery
Cons
- Heavy at 229 g and thick at 9.17 mm
- Very expensive at $999 with limited global availability
- HyperOS software experience lags behind iOS and One UI
- Camera bump is extremely large
Full Specifications
| Spec | Apple iPhone X | Xiaomi 15 Ultra |
|---|---|---|
| Software | iOS 11 | Android 15 (HyperOS 2) |
| Body | ||
| Weight | 174 g | 229 g |
| Material | Stainless steel frame, glass back | Titanium frame, Gorilla Glass Victus 2 |
| IP rating | IP67 | IP68 |
| Dimensions | 143.6 x 70.9 x 7.7 mm | 161.1 x 75.2 x 9.17 mm |
| Camera | ||
| Main camera | 12 MP, f/1.8, OIS | 50 MP, f/1.63, OIS (1-inch sensor) |
| Front camera | 7 MP TrueDepth, f/2.2 | 32 MP, f/2.0 |
| Video | 4K@60fps | 8K@30fps, 4K@120fps |
| Telephoto | 12 MP, f/2.4, 2x optical zoom | 200 MP, f/2.6, 5x periscope optical zoom, OIS |
| Ultrawide | — | 50 MP, f/2.0, 128-degree |
| Memory | ||
| RAM | 3 GB | 16 GB |
| Storage options | 64 GB, 256 GB | 256 GB, 512 GB, 1 TB |
| Battery | ||
| Capacity | 2716 mAh | 5810 mAh |
| Charging | 18W wired (adapter sold separately) | 90W wired |
| Wireless charging | 7.5W Qi | 50W wireless |
| Display | ||
| Size | 5.8 inches | 6.73 inches |
| Type | Super Retina OLED | LTPO AMOLED |
| Resolution | 2436 x 1125 | 3200 x 1440 |
| Refresh rate | 60Hz | 1-120Hz |
| Brightness (nits) | 625 | 3200 |
| Processor | ||
| CPU | Hexa-core (2x2.39 GHz + 4x1.7 GHz) | Octa-core (2x4.32 GHz + 6x3.53 GHz) |
| GPU | Apple GPU (3-core) | Adreno 830 |
| Chipset | Apple A11 Bionic | Qualcomm Snapdragon 8 Elite |
| Connectivity | ||
| 5G | ||
| NFC | ||
| USB | Lightning | USB-C 3.2 |
| Wi-Fi | Wi-Fi 5 (802.11ac) | Wi-Fi 7 |
| Bluetooth | 5.0 | 5.4 |
Want to compare a third product?
Add another product for a 3-way comparison.
Related Comparisons
This comparison is based on verified manufacturer specifications covering display, performance, camera, battery, and build quality. Scores are generated by analyzing specs across weighted categories on a 10-point scale. Learn more about our methodology.
Explore more in phones, see all Apple products or all Xiaomi products. View full details for the Apple iPhone X or the Xiaomi 15 Ultra.