Between the OnePlus 12 and ROG Phone 9 Pro, the OnePlus 12 comes out ahead in wireless charging and wired charging, while the ROG Phone 9 Pro wins on ram and refresh rate. Overall, the OnePlus 12 scores 69.6 and the ROG Phone 9 Pro scores 77.7 on our Mars Score.
Which should you buy?
The ROG Phone 9 Pro is the clear pick on raw spec strength, leading by 8.1 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the OnePlus 12 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 wireless charging, wired charging, pixel density, among others.
Pick the ROG Phone 9 Pro 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 ram, refresh rate, antutu, among others.
Both ship with comparable main camera, 5g support, front camera, so those specs don't separate the two — focus on the differences below.
Bottom line: the ROG Phone 9 Pro is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why OnePlus 12 wins
- ▲Wireless charging — 233.33% more. 50 W vs 15 W.
- ▲Wired charging — 53.85% more. 100 W vs 65 W.
- ▲Pixel density — 31.44% more. 510 ppi vs 388 ppi.
- ▲Weight — 7.00 g less. 220 vs 227.
- ▲Screen size — 0.59% more. 6.82 " vs 6.78 ".
- ▲Promised OS updates: 4 (vs 3).
Why ASUS - ROG Phone 9 Pro wins
- ▲RAM — 100.00% more. 24 GB vs 12 GB.
- ▲Refresh rate — 54.17% more. 185 Hz vs 120 Hz.
- ▲AnTuTu — 30.10% more. 2680000 vs 2060000.
- ▲Battery capacity — 7.41% more. 5800 mAh vs 5400 mAh.
- ▲Has Headphone jack.
- ▲Water resistance: IP68 (vs IP65).
Spec comparison
Design
| Spec | OnePlus 12 | ASUS - ROG Phone 9 Pro |
|---|---|---|
| Weight | 220 glead | 227 g |
| Thickness | 9.15 mm | 8.9 mmlead |
| Water resistanceⓘ | IP65 | IP68lead |
| Form factor | bar | bar |
Display
| Spec | OnePlus 12 | ASUS - ROG Phone 9 Pro |
|---|---|---|
| Screen sizeⓘ | 6.82 "lead | 6.78 " |
| Pixel densityⓘ | 510 ppilead | 388 ppi |
| Refresh rateⓘ | 120 Hz | 185 Hzlead |
| Peak brightnessⓘ | 4500 nitslead | 2500 nits |
Performance
Cameras
| Spec | OnePlus 12 | ASUS - ROG Phone 9 Pro |
|---|---|---|
| Main cameraⓘ | 50 MP | 50 MP |
| Front camera | 32 MP | 32 MP |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | OnePlus 12 | ASUS - ROG Phone 9 Pro |
|---|---|---|
| Battery capacity | 5400 mAh | 5800 mAhlead |
| Wired chargingⓘ | 100 Wlead | 65 W |
| Wireless chargingⓘ | 50 Wlead | 15 W |
Connectivity
| Spec | OnePlus 12 | ASUS - ROG Phone 9 Pro |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | truelead |
| microSD slot | false | false |
Operating System
| Spec | OnePlus 12 | ASUS - ROG Phone 9 Pro |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 4 yearslead | 3 years |
Frequently asked
Which has better battery, OnePlus 12 or ROG Phone 9 Pro?+
ROG Phone 9 Pro has 7.4% more battery — 5400 mAh vs 5800 mAh.
Which is lighter, OnePlus 12 or ROG Phone 9 Pro?+
OnePlus 12 is 7g lighter — 220g vs 227g.
Is OnePlus 12 waterproof?+
OnePlus 12 has an IP65 rating.
Does ROG Phone 9 Pro support 5G?+
Yes, ROG Phone 9 Pro supports 5G.
Which has more RAM, OnePlus 12 or ROG Phone 9 Pro?+
ROG Phone 9 Pro offers 24GB of RAM.
Which has a better camera, OnePlus 12 or ROG Phone 9 Pro?+
ROG Phone 9 Pro has a 50 MP main camera vs 50 MP.
Spec-level deep dives
More from the same brands
vsMars is reader-supported. When you buy through links on our site, we may earn an affiliate commission at no extra cost to you. Learn more.