Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Nubia - Z70 Ultra | ASUS - ROG Phone 9 |
|---|---|---|
| Front camera | 16 MP | 32 MP |
| Refresh rate | 144 Hz | 185 Hz |
| Wired charging | 80 W | 65 W |
| Battery capacity | 6150 mAh | 5800 mAh |
| AnTuTu | 2640000 | 2580000 |
| Screen size | 6.85 " | 6.78 " |
Between the Z70 Ultra and ROG Phone 9, the Z70 Ultra comes out ahead in wired charging / battery capacity, while the ROG Phone 9 wins on front camera / refresh rate. Overall, the Z70 Ultra scores 72.4 and the ROG Phone 9 scores 72.4 on our Mars Score.
Which should you buy?
These two are evenly matched on the broad strokes; the decision sits on which individual spec advantages weigh more for your use.
Pick the Z70 Ultra if your top frustration with your current device is running out of charge before the day ends — endurance is the lead spec here. The biggest gaps in its favor are wired charging, battery capacity, antutu, among others. The single most decisive one: Wired charging — 23.08% more. 80 W vs 65 W.
Pick the ROG Phone 9 if you photograph or shoot video regularly and want the better imaging pipeline of the two. Its strongest claims are front camera, refresh rate, headphone jack. The single most decisive one: Front camera — 100.00% more. 32 MP vs 16 MP.
Both ship with comparable ram, main camera, weight, so those specs do not 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 says both are well-rounded; the differences are about trade-offs, not quality.
Which should you buy: Nubia - Z70 Ultra or ASUS - ROG Phone 9?
The two products are effectively tied on the current Mars Score.The more useful decision is the trade-off behind that result: compare screen size, battery capacity against the way you will actually use the product.
Choose Nubia - Z70 Ultra if…
Nubia - Z70 Ultra has the measurable edge on wired charging w, battery capacity mah, antutu score.
Choose ASUS - ROG Phone 9 if…
ASUS - ROG Phone 9 has the measurable edge on front cam mp, refresh rate hz, has headphone jack.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why Nubia - Z70 Ultra wins
- ▲Wired charging — 23.08% more. 80 W vs 65 W.
- ▲Battery capacity — 6.03% more. 6150 mAh vs 5800 mAh.
- ▲AnTuTu — 2.33% more. 2640000 vs 2580000.
- ▲Screen size — 1.03% more. 6.85 " vs 6.78 ".
Why ASUS - ROG Phone 9 wins
- ▲Front camera — 100.00% more. 32 MP vs 16 MP.
- ▲Refresh rate — 28.47% more. 185 Hz vs 144 Hz.
- ▲Has Headphone jack.
Spec comparison
Design
| Spec | Nubia - Z70 Ultra | ASUS - ROG Phone 9 |
|---|---|---|
| Weight | 227 g | 227 g |
| Thickness | 8.7 mmlead | 8.9 mm |
| Water resistanceⓘ | IP68 | IP68 |
| Form factor | bar | bar |
Display
| Spec | Nubia - Z70 Ultra | ASUS - ROG Phone 9 |
|---|---|---|
| Screen size | 6.85 "lead | 6.78 " |
| Pixel densityⓘ | 388 ppi | 388 ppi |
| Refresh rateⓘ | 144 Hz | 185 Hzlead |
| Peak brightnessⓘ | 2000 nits | 2500 nitslead |
Performance
| Spec | Nubia - Z70 Ultra | ASUS - ROG Phone 9 |
|---|---|---|
| RAMⓘ | 16 GB | 16 GB |
| Storageⓘ | 512 GB | 512 GB |
| AnTuTuⓘ | 2640000lead | 2580000 |
| CPU total clockⓘ | 22.8 GHzlead | 22.0 GHz |
Cameras
| Spec | Nubia - Z70 Ultra | ASUS - ROG Phone 9 |
|---|---|---|
| Main cameraⓘ | 50 MP | 50 MP |
| Front camera | 16 MP | 32 MPlead |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | Nubia - Z70 Ultra | ASUS - ROG Phone 9 |
|---|---|---|
| Battery capacityⓘ | 6150 mAhlead | 5800 mAh |
| Wired chargingⓘ | 80 Wlead | 65 W |
| Wireless chargingⓘ | 15 W | 15 W |
Connectivity
| Spec | Nubia - Z70 Ultra | ASUS - ROG Phone 9 |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | truelead |
| microSD slot | false | false |
Operating System
| Spec | Nubia - Z70 Ultra | ASUS - ROG Phone 9 |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 3 years | 3 years |
Frequently asked
Which has better battery, Z70 Ultra or ROG Phone 9?+
Z70 Ultra has 6.0% more battery — 6150 mAh vs 5800 mAh.
Which is lighter, Z70 Ultra or ROG Phone 9?+
ROG Phone 9 is 0g lighter — 227g vs 227g.
Is Z70 Ultra waterproof?+
Z70 Ultra has an IP68 rating.
Does ROG Phone 9 support 5G?+
Yes, ROG Phone 9 supports 5G.
Which has a better camera, Z70 Ultra or ROG Phone 9?+
ROG Phone 9 has a 50 MP main camera vs 50 MP.