OnePlus Nord N300 5G vs Xiaomi 15 Ultra
The Verdict
These phones serve entirely different market segments. The OnePlus Nord N300 5G targets budget-conscious users with a 6.56-inch 90Hz IPS LCD display, MediaTek Dimensity 810 processor, and modest 4GB RAM paired with 64GB storage. Its 5000mAh battery supports 33W charging, while the camera system features a 48MP main sensor with basic 1080p video recording. The Xiaomi 15 Ultra is a flagship powerhouse with a 6.73-inch 120Hz AMOLED display delivering 3200 nits brightness, Snapdragon 8 Elite chipset, 16GB RAM, and up to 1TB storage. Its camera array includes a 1-inch 50MP primary sensor with OIS, 200MP 5x periscope telephoto, 50MP ultrawide, and 8K video capability. Battery capacity reaches 5810mAh with 90W wired and 50W wireless charging. Build quality differs dramatically: the Nord uses plastic construction without IP rating, while the Ultra features titanium with Gorilla Glass Victus 2 and IP68 dust/water resistance. At $228 versus $999, the Nord N300 5G excels for basic tasks like messaging, social media, and light gaming. The Xiaomi 15 Ultra dominates photography, video, gaming, and multitasking. Choose the Nord for budget limitations; select the Ultra if you want cutting-edge camera and performance capabilities.
Who Should Buy
Buy the OnePlus Nord N300 5G if…
- →5G connectivity at a budget-friendly $228
- →33W SUPERVOOC fast charging at this price is impressive
- →5000 mAh battery provides reliable two-day endurance
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
OnePlus Nord N300 5G
Pros
- 5G connectivity at a budget-friendly $228
- 33W SUPERVOOC fast charging at this price is impressive
- 5000 mAh battery provides reliable two-day endurance
- Clean OxygenOS with minimal bloatware
- NFC for contactless payments
Cons
- HD+ resolution is noticeably low on the 6.56-inch display
- Only 4 GB RAM and 64 GB storage is very tight
- 2 MP depth sensor is essentially useless
- Dimensity 810 is basic — limited gaming capability
- Only one OS update promised
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 | OnePlus Nord N300 5G | Xiaomi 15 Ultra |
|---|---|---|
| Software | Android 12 (OxygenOS 12.1) | Android 15 (HyperOS 2) |
| Body | ||
| Weight | 190 g | 229 g |
| Material | Plastic frame and back | Titanium frame, Gorilla Glass Victus 2 |
| IP rating | None | IP68 |
| Dimensions | 163.8 x 75.1 x 8.0 mm | 161.1 x 75.2 x 9.17 mm |
| Camera | ||
| Main camera | 48 MP, f/1.8, PDAF | 50 MP, f/1.63, OIS (1-inch sensor) |
| Depth | 2 MP, f/2.4 | — |
| Front camera | 8 MP, f/2.0 | 32 MP, f/2.0 |
| Video | 1080p@30fps | 8K@30fps, 4K@120fps |
| Telephoto | — | 200 MP, f/2.6, 5x periscope optical zoom, OIS |
| Ultrawide | — | 50 MP, f/2.0, 128-degree |
| Memory | ||
| RAM | 4 GB | 16 GB |
| Storage options | 64 GB | 256 GB, 512 GB, 1 TB |
| Battery | ||
| Capacity | 5000 mAh | 5810 mAh |
| Charging | 33W SUPERVOOC | 90W wired |
| Wireless charging | No | 50W wireless |
| Display | ||
| Size | 6.56 inches | 6.73 inches |
| Type | IPS LCD | LTPO AMOLED |
| Resolution | 1612 x 720 | 3200 x 1440 |
| Refresh rate | 90Hz | 1-120Hz |
| Brightness (nits) | 550 | 3200 |
| Processor | ||
| CPU | Octa-core (2x2.4 GHz + 6x2.0 GHz) | Octa-core (2x4.32 GHz + 6x3.53 GHz) |
| GPU | Mali-G57 MC2 | Adreno 830 |
| Chipset | MediaTek Dimensity 810 | Qualcomm Snapdragon 8 Elite |
| Connectivity | ||
| 5G | ||
| NFC | ||
| USB | USB-C 2.0 | USB-C 3.2 |
| Wi-Fi | Wi-Fi 5 | Wi-Fi 7 |
| Bluetooth | 5.2 | 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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