Between the OnePlus Open 2 and Xiaomi 16 Ultra, the OnePlus Open 2 comes out ahead in screen size, while the Xiaomi 16 Ultra wins on wireless charging and pixel density. Overall, the OnePlus Open 2 scores 74.5 and the Xiaomi 16 Ultra scores 74.3 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (74.5 vs 74.3). The decision isn't about overall quality — both clear the bar — it's about which specific trade-offs fit your use.
Pick the OnePlus Open 2 if the display is what you stare at all day — refresh rate, brightness, or sharpness is where the difference will be most visible. The biggest gaps in its favor are screen size.
Pick the Xiaomi 16 Ultra if the display is what you stare at all day — refresh rate, brightness, or sharpness is where the difference will be most visible. Its strongest claims are wireless charging, pixel density, wired charging, among others.
Both ship with comparable ram, main camera, refresh rate, so those specs don't separate the two — focus on the differences below.
Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity tells you both are well-rounded; the differences are about trade-offs, not quality.
Why OnePlus Open 2 wins
- ▲Screen size — 18.87% more. 8.0 " vs 6.73 ".
Why Xiaomi 16 Ultra wins
- ▲Wireless charging — 60.00% more. 80 W vs 50 W.
- ▲Pixel density — 29.85% more. 522 ppi vs 402 ppi.
- ▲Wired charging — 25.00% more. 100 W vs 80 W.
- ▲AnTuTu — 10.07% more. 2950000 vs 2680000.
- ▲Weight — 10.00 g less. 229 vs 239.
- ▲Battery capacity — 5.26% more. 6000 mAh vs 5700 mAh.
- ▲Promised OS updates: 5 (vs 4).
Spec comparison
Design
| Spec | OnePlus Open 2 | Xiaomi 16 Ultra |
|---|---|---|
| Weight | 239 g | 229 glead |
| Thickness | 11.7 mm | 9.2 mmlead |
| Water resistanceⓘ | IP68 | IP68 |
| Form factor | foldable_booklead | bar |
Display
| Spec | OnePlus Open 2 | Xiaomi 16 Ultra |
|---|---|---|
| Screen sizeⓘ | 8.0 "lead | 6.73 " |
| Pixel densityⓘ | 402 ppi | 522 ppilead |
| Refresh rateⓘ | 120 Hz | 120 Hz |
| Peak brightnessⓘ | 4500 nitslead | 3200 nits |
Performance
Cameras
| Spec | OnePlus Open 2 | Xiaomi 16 Ultra |
|---|---|---|
| Main cameraⓘ | 50 MP | 50 MP |
| Front camera | 32 MP | 32 MP |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | OnePlus Open 2 | Xiaomi 16 Ultra |
|---|---|---|
| Battery capacity | 5700 mAh | 6000 mAhlead |
| Wired chargingⓘ | 80 W | 100 Wlead |
| Wireless chargingⓘ | 50 W | 80 Wlead |
Connectivity
| Spec | OnePlus Open 2 | Xiaomi 16 Ultra |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | false |
| microSD slot | false | false |
Operating System
| Spec | OnePlus Open 2 | Xiaomi 16 Ultra |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 4 years | 5 yearslead |
Frequently asked
Which has better battery, OnePlus Open 2 or Xiaomi 16 Ultra?+
Xiaomi 16 Ultra has 5.3% more battery — 5700 mAh vs 6000 mAh.
Which is lighter, OnePlus Open 2 or Xiaomi 16 Ultra?+
Xiaomi 16 Ultra is 10g lighter — 239g vs 229g.
Is OnePlus Open 2 waterproof?+
OnePlus Open 2 has an IP68 rating.
Does Xiaomi 16 Ultra support 5G?+
Yes, Xiaomi 16 Ultra supports 5G.
Which has a better camera, OnePlus Open 2 or Xiaomi 16 Ultra?+
Xiaomi 16 Ultra has a 50 MP main camera vs 50 MP.
Spec-level deep dives
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