Realme GT 6 vs Xiaomi 15 Ultra
The Verdict
Realme GT 6 delivers exceptional value at $449, pairing a Snapdragon 8s Gen 3 processor with a vibrant 6000-nit LTPO AMOLED display and impressive 120W charging into a lightweight 199g frame. Its 50MP main camera with OIS and capable 2x telephoto handle most photography well. Xiaomi 15 Ultra demands $999 but justifies it through flagship specifications: Snapdragon 8 Elite, superior 1-inch sensor main camera, exceptional 5x periscope zoom telephoto, 8K video capability, and wireless charging. Its titanium build and higher IP68 rating offer premium durability, though the 3200-nit display trails the GT 6's brightness. Budget-conscious buyers seeking strong all-around performance should choose the Realme GT 6—it punches well above its price. Photography enthusiasts and professionals requiring advanced zoom and 8K recording capabilities will find the Xiaomi 15 Ultra's premium camera system worth the investment.
Who Should Buy
Buy the Realme GT 6 if…
- →6000-nit peak brightness is the highest on any phone screen period
- →120W charging fills the 5500 mAh battery in about 20 minutes
- →Sony LYT-808 main sensor captures excellent daylight photos
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
Realme GT 6
Pros
- 6000-nit peak brightness is the highest on any phone screen period
- 120W charging fills the 5500 mAh battery in about 20 minutes
- Sony LYT-808 main sensor captures excellent daylight photos
- Snapdragon 8s Gen 3 offers near-flagship performance
- Aggressive pricing undercuts Samsung and Google alternatives
Cons
- 8MP ultrawide is a letdown at this price
- Plastic frame feels cheaper than metal alternatives
- Realme UI comes with bloatware and occasional ads
- IP65 splash resistance — not waterproof
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 | Realme GT 6 | Xiaomi 15 Ultra |
|---|---|---|
| Software | Android 14 (Realme UI 5) | Android 15 (HyperOS 2) |
| Body | ||
| Weight | 199 g | 229 g |
| Material | Plastic frame, Gorilla Glass Victus 2 | Titanium frame, Gorilla Glass Victus 2 |
| IP rating | IP65 | IP68 |
| Dimensions | 162.0 x 75.1 x 8.6 mm | 161.1 x 75.2 x 9.17 mm |
| Camera | ||
| Main camera | 50 MP, f/1.69, OIS (Sony LYT-808) | 50 MP, f/1.63, OIS (1-inch sensor) |
| Front camera | 32 MP, f/2.4 | 32 MP, f/2.0 |
| Video | 4K@60fps | 8K@30fps, 4K@120fps |
| Telephoto | 50 MP, f/2.0, 2x telephoto | 200 MP, f/2.6, 5x periscope optical zoom, OIS |
| Ultrawide | 8 MP, f/2.2 | 50 MP, f/2.0, 128-degree |
| Memory | ||
| RAM | 8 GB | 16 GB |
| Storage options | 256 GB, 512 GB | 256 GB, 512 GB, 1 TB |
| Battery | ||
| Capacity | 5500 mAh | 5810 mAh |
| Charging | 120W wired | 90W wired |
| Wireless charging | — | 50W wireless |
| Display | ||
| Size | 6.78 inches | 6.73 inches |
| Type | LTPO AMOLED | LTPO AMOLED |
| Resolution | 2780 x 1264 | 3200 x 1440 |
| Refresh rate | 1-120Hz | 1-120Hz |
| Brightness (nits) | 6000 | 3200 |
| Processor | ||
| CPU | Octa-core | Octa-core (2x4.32 GHz + 6x3.53 GHz) |
| GPU | Adreno 735 | Adreno 830 |
| Chipset | Qualcomm Snapdragon 8s Gen 3 | Qualcomm Snapdragon 8 Elite |
| Connectivity | ||
| 5G | ||
| NFC | ||
| USB | USB-C 2.0 | USB-C 3.2 |
| Wi-Fi | Wi-Fi 6 | Wi-Fi 7 |
| Bluetooth | 5.4 | 5.4 |
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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.
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