Between the Zenfone 11 Ultra and ROG Phone 9, the Zenfone 11 Ultra comes out ahead in weight, while the ROG Phone 9 wins on refresh rate and antutu. Overall, the Zenfone 11 Ultra scores 71.9 and the ROG Phone 9 scores 75.1 on our Mars Score.
Which should you buy?
The ROG Phone 9 edges ahead on the Mars Score (71.9 vs 75.1), but the 3.2-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 if your top frustration with your current device is running out of charge before the day ends — endurance is the lead spec here. Its strongest claims are refresh rate, antutu, battery capacity, among others.
Both ship with comparable ram, main camera, screen size, 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
- ▲Weight — 3.00 g less. 224 vs 227.
Why ASUS - ROG Phone 9 wins
- ▲Refresh rate — 28.47% more. 185 Hz vs 144 Hz.
- ▲AnTuTu — 24.64% more. 2580000 vs 2070000.
- ▲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 |
|---|---|---|
| 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 |
|---|---|---|
| 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 |
|---|---|---|
| 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 |
|---|---|---|
| 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 |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | truelead |
| microSD slot | false | false |
Operating System
| Spec | ASUS - Zenfone 11 Ultra | ASUS - ROG Phone 9 |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 2 years | 3 yearslead |
Frequently asked
Which has better battery, Zenfone 11 Ultra or ROG Phone 9?+
ROG Phone 9 has 5.5% more battery — 5500 mAh vs 5800 mAh.
Which is lighter, Zenfone 11 Ultra or ROG Phone 9?+
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 support 5G?+
Yes, ROG Phone 9 supports 5G.
Which has a better camera, Zenfone 11 Ultra or ROG Phone 9?+
ROG Phone 9 has a 50 MP main camera vs 50 MP.
Spec-level deep dives
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