Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | ASUS - ROG Phone 9 | Xiaomi 16 Ultra |
|---|---|---|
| Wireless charging | 15 W | 80 W |
| Refresh rate | 185 Hz | 120 Hz |
| Wired charging | 65 W | 100 W |
| Pixel density | 388 ppi | 522 ppi |
| AnTuTu | 2580000 | 2950000 |
| Battery capacity | 5800 mAh | 6000 mAh |
Between the ROG Phone 9 and Xiaomi 16 Ultra, the ROG Phone 9 comes out ahead in refresh rate / weight, while the Xiaomi 16 Ultra wins on wireless charging / wired charging. Overall, the ROG Phone 9 scores 72.4 and the Xiaomi 16 Ultra 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 ROG Phone 9 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, headphone jack, among others. The single most decisive one: Refresh rate — 54.17% more. 185 Hz vs 120 Hz.
Pick the Xiaomi 16 Ultra if you care most about wireless charging / wired charging. Its strongest claims are wireless charging, wired charging, pixel density, among others. The single most decisive one: Wireless charging — 433.33% more. 80 W vs 15 W.
Both ship with comparable ram, main camera, 5g support, 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: ASUS - ROG Phone 9 or Xiaomi 16 Ultra?
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, pixel density, battery capacity against the way you will actually use the product.
Choose ASUS - ROG Phone 9 if…
ASUS - ROG Phone 9 has the measurable edge on refresh rate hz, weight g, has headphone jack.
Choose Xiaomi 16 Ultra if…
Xiaomi 16 Ultra has the measurable edge on wireless charging w, wired charging w, pixel density ppi.
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 ASUS - ROG Phone 9 wins
- ▲Refresh rate — 54.17% more. 185 Hz vs 120 Hz.
- ▲Weight — 2.00 g less. 227 vs 229.
- ▲Has Headphone jack.
- ▲Screen size — 0.74% more. 6.78 " vs 6.73 ".
Why Xiaomi 16 Ultra wins
- ▲Wireless charging — 433.33% more. 80 W vs 15 W.
- ▲Wired charging — 53.85% more. 100 W vs 65 W.
- ▲Pixel density — 34.54% more. 522 ppi vs 388 ppi.
- ▲AnTuTu — 14.34% more. 2950000 vs 2580000.
- ▲Battery capacity — 3.45% more. 6000 mAh vs 5800 mAh.
- ▲Promised OS updates: 5 (vs 3).
Spec comparison
Design
| Spec | ASUS - ROG Phone 9 | Xiaomi 16 Ultra |
|---|---|---|
| Weight | 227 glead | 229 g |
| Thickness | 8.9 mmlead | 9.2 mm |
| Water resistanceⓘ | IP68 | IP68 |
| Form factor | bar | bar |
Display
| Spec | ASUS - ROG Phone 9 | Xiaomi 16 Ultra |
|---|---|---|
| Screen size | 6.78 "lead | 6.73 " |
| Pixel densityⓘ | 388 ppi | 522 ppilead |
| Refresh rateⓘ | 185 Hzlead | 120 Hz |
| Peak brightnessⓘ | 2500 nits | 3200 nitslead |
Performance
| Spec | ASUS - ROG Phone 9 | Xiaomi 16 Ultra |
|---|---|---|
| RAMⓘ | 16 GB | 16 GB |
| Storageⓘ | 512 GB | 512 GB |
| AnTuTuⓘ | 2580000 | 2950000lead |
| CPU total clockⓘ | 22.0 GHz | 23.4 GHzlead |
Cameras
| Spec | ASUS - ROG Phone 9 | Xiaomi 16 Ultra |
|---|---|---|
| Main cameraⓘ | 50 MP | 50 MP |
| Front camera | 32 MP | 32 MP |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | ASUS - ROG Phone 9 | Xiaomi 16 Ultra |
|---|---|---|
| Battery capacityⓘ | 5800 mAh | 6000 mAhlead |
| Wired chargingⓘ | 65 W | 100 Wlead |
| Wireless chargingⓘ | 15 W | 80 Wlead |
Connectivity
| Spec | ASUS - ROG Phone 9 | Xiaomi 16 Ultra |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | truelead | false |
| microSD slot | false | false |
Operating System
| Spec | ASUS - ROG Phone 9 | Xiaomi 16 Ultra |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 3 years | 5 yearslead |
Frequently asked
Which has better battery, ROG Phone 9 or Xiaomi 16 Ultra?+
Xiaomi 16 Ultra has 3.4% more battery — 5800 mAh vs 6000 mAh.
Which is lighter, ROG Phone 9 or Xiaomi 16 Ultra?+
ROG Phone 9 is 2g lighter — 227g vs 229g.
Is ROG Phone 9 waterproof?+
ROG Phone 9 has an IP68 rating.
Does Xiaomi 16 Ultra support 5G?+
Yes, Xiaomi 16 Ultra supports 5G.
Which has a better camera, ROG Phone 9 or Xiaomi 16 Ultra?+
Xiaomi 16 Ultra has a 50 MP main camera vs 50 MP.