Between the Zenfone 11 Ultra and OnePlus Open 2, the Zenfone 11 Ultra comes out ahead in refresh rate and weight, while the OnePlus Open 2 wins on wireless charging and antutu. Overall, the Zenfone 11 Ultra scores 71.9 and the OnePlus Open 2 scores 74.5 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (71.9 vs 74.5). The decision isn't about overall quality — both clear the bar — it's about which specific trade-offs fit your use.
Pick the Zenfone 11 Ultra 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 refresh rate, weight.
Pick the OnePlus Open 2 if you push the hardware — gaming, on-device AI, heavy multitasking — and the extra compute headroom is worth the trade-offs. Its strongest claims are wireless charging, antutu, wired charging, among others.
Both ship with comparable ram, main camera, 5g support, 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 ASUS - Zenfone 11 Ultra wins
- ▲Refresh rate — 20.00% more. 144 Hz vs 120 Hz.
- ▲Weight — 15.00 g less. 224 vs 239.
Why OnePlus Open 2 wins
- ▲Wireless charging — 233.33% more. 50 W vs 15 W.
- ▲AnTuTu — 29.47% more. 2680000 vs 2070000.
- ▲Wired charging — 23.08% more. 80 W vs 65 W.
- ▲Screen size — 17.99% more. 8.0 " vs 6.78 ".
- ▲Battery capacity — 3.64% more. 5700 mAh vs 5500 mAh.
- ▲Pixel density — 3.61% more. 402 ppi vs 388 ppi.
- ▲Promised OS updates: 4 (vs 2).
Spec comparison
Design
| Spec | ASUS - Zenfone 11 Ultra | OnePlus Open 2 |
|---|---|---|
| Weight | 224 glead | 239 g |
| Thickness | 8.9 mmlead | 11.7 mm |
| Water resistanceⓘ | IP68 | IP68 |
| Form factor | bar | foldable_booklead |
Display
| Spec | ASUS - Zenfone 11 Ultra | OnePlus Open 2 |
|---|---|---|
| Screen sizeⓘ | 6.78 " | 8.0 "lead |
| Pixel densityⓘ | 388 ppi | 402 ppilead |
| Refresh rateⓘ | 144 Hzlead | 120 Hz |
| Peak brightnessⓘ | 2500 nits | 4500 nitslead |
Performance
Cameras
| Spec | ASUS - Zenfone 11 Ultra | OnePlus Open 2 |
|---|---|---|
| Main cameraⓘ | 50 MP | 50 MP |
| Front camera | 32 MP | 32 MP |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | ASUS - Zenfone 11 Ultra | OnePlus Open 2 |
|---|---|---|
| Battery capacity | 5500 mAh | 5700 mAhlead |
| Wired chargingⓘ | 65 W | 80 Wlead |
| Wireless chargingⓘ | 15 W | 50 Wlead |
Connectivity
| Spec | ASUS - Zenfone 11 Ultra | OnePlus Open 2 |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | false |
| microSD slot | false | false |
Operating System
| Spec | ASUS - Zenfone 11 Ultra | OnePlus Open 2 |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 2 years | 4 yearslead |
Frequently asked
Which has better battery, Zenfone 11 Ultra or OnePlus Open 2?+
OnePlus Open 2 has 3.6% more battery — 5500 mAh vs 5700 mAh.
Which is lighter, Zenfone 11 Ultra or OnePlus Open 2?+
Zenfone 11 Ultra is 15g lighter — 224g vs 239g.
Is Zenfone 11 Ultra waterproof?+
Zenfone 11 Ultra has an IP68 rating.
Does OnePlus Open 2 support 5G?+
Yes, OnePlus Open 2 supports 5G.
Which has a better camera, Zenfone 11 Ultra or OnePlus Open 2?+
OnePlus Open 2 has a 50 MP main camera vs 50 MP.
Spec-level deep dives
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