Between the Zenfone 11 Ultra and ROG Phone 9 Pro, the Zenfone 11 Ultra comes out ahead in weight, while the ROG Phone 9 Pro wins on ram and antutu. Overall, the Zenfone 11 Ultra scores 71.9 and the ROG Phone 9 Pro scores 77.7 on our Mars Score.
Which should you buy?
The ROG Phone 9 Pro edges ahead on the Mars Score (71.9 vs 77.7), but the 5.8-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Zenfone 11 Ultra if you carry the device everywhere and weight or thickness has been the deciding factor before. The biggest gaps in its favor are weight.
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, antutu, refresh rate, among others.
Both ship with comparable main camera, screen size, 5g support, 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 ASUS - Zenfone 11 Ultra wins
- ▲Weight — 3.00 g less. 224 vs 227.
Why ASUS - ROG Phone 9 Pro wins
- ▲RAM — 50.00% more. 24 GB vs 16 GB.
- ▲AnTuTu — 29.47% more. 2680000 vs 2070000.
- ▲Refresh rate — 28.47% more. 185 Hz vs 144 Hz.
- ▲Battery capacity — 5.45% more. 5800 mAh vs 5500 mAh.
- ▲Has Headphone jack.
- ▲Promised OS updates: 3 (vs 2).
Spec comparison
Design
| Spec | ASUS - Zenfone 11 Ultra | ASUS - ROG Phone 9 Pro |
|---|---|---|
| Weight | 224 glead | 227 g |
| Thickness | 8.9 mm | 8.9 mm |
| Water resistanceⓘ | IP68 | IP68 |
| Form factor | bar | bar |
Display
| Spec | ASUS - Zenfone 11 Ultra | ASUS - ROG Phone 9 Pro |
|---|---|---|
| Screen sizeⓘ | 6.78 " | 6.78 " |
| Pixel densityⓘ | 388 ppi | 388 ppi |
| Refresh rateⓘ | 144 Hz | 185 Hzlead |
| Peak brightnessⓘ | 2500 nits | 2500 nits |
Performance
Cameras
| Spec | ASUS - Zenfone 11 Ultra | ASUS - ROG Phone 9 Pro |
|---|---|---|
| Main cameraⓘ | 50 MP | 50 MP |
| Front camera | 32 MP | 32 MP |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | ASUS - Zenfone 11 Ultra | ASUS - ROG Phone 9 Pro |
|---|---|---|
| Battery capacity | 5500 mAh | 5800 mAhlead |
| Wired chargingⓘ | 65 W | 65 W |
| Wireless chargingⓘ | 15 W | 15 W |
Connectivity
| Spec | ASUS - Zenfone 11 Ultra | ASUS - ROG Phone 9 Pro |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | truelead |
| microSD slot | false | false |
Operating System
| Spec | ASUS - Zenfone 11 Ultra | ASUS - ROG Phone 9 Pro |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 2 years | 3 yearslead |
Frequently asked
Which has better battery, Zenfone 11 Ultra or ROG Phone 9 Pro?+
ROG Phone 9 Pro has 5.5% more battery — 5500 mAh vs 5800 mAh.
Which is lighter, Zenfone 11 Ultra or ROG Phone 9 Pro?+
Zenfone 11 Ultra is 3g lighter — 224g vs 227g.
Is Zenfone 11 Ultra waterproof?+
Zenfone 11 Ultra has an IP68 rating.
Does ROG Phone 9 Pro support 5G?+
Yes, ROG Phone 9 Pro supports 5G.
Which has more RAM, Zenfone 11 Ultra or ROG Phone 9 Pro?+
ROG Phone 9 Pro offers 24GB of RAM.
Which has a better camera, Zenfone 11 Ultra or ROG Phone 9 Pro?+
ROG Phone 9 Pro has a 50 MP main camera vs 50 MP.
Spec-level deep dives
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