Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | ASUS - Zenfone 11 Ultra | OnePlus 15 |
|---|---|---|
| Wireless charging | 15 W | 50 W |
| Wired charging | 65 W | 120 W |
| AnTuTu | 2070000 | 2950000 |
| Battery capacity | 5500 mAh | 7500 mAh |
| Refresh rate | 144 Hz | 120 Hz |
| Pixel density | 388 ppi | 450 ppi |
Between the Zenfone 11 Ultra and OnePlus 15, the Zenfone 11 Ultra comes out ahead in refresh rate, while the OnePlus 15 wins on wireless charging / wired charging. Overall, the Zenfone 11 Ultra scores 69.2 and the OnePlus 15 scores 76.7 on our Mars Score.
Which should you buy?
The OnePlus 15 edges ahead on the Mars Score (69.2 vs 76.7), but the 7.5-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Zenfone 11 Ultra 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. The single most decisive one: Refresh rate — 20.00% more. 144 Hz vs 120 Hz.
Pick the OnePlus 15 if you push the hardware — gaming, on-device AI, heavy multitasking — and the extra compute headroom is worth the trade-offs. Its strongest claims are wireless charging, wired charging, antutu, among others. The single most decisive one: Wireless charging — 233.33% more. 50 W vs 15 W.
Both ship with comparable ram, main camera, screen size, so those specs do not separate the two — focus on the differences below.
Bottom line: the OnePlus 15 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: ASUS - Zenfone 11 Ultra or OnePlus 15?
OnePlus 15 leads the current Mars Score by 7.5 points.The more useful decision is the trade-off behind that result: compare pixel density, battery capacity against the way you will actually use the product.
Choose ASUS - Zenfone 11 Ultra if…
ASUS - Zenfone 11 Ultra has the measurable edge on refresh rate hz.
Choose OnePlus 15 if…
OnePlus 15 has the measurable edge on wireless charging w, wired charging w, antutu score.
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 - Zenfone 11 Ultra wins
- ▲Refresh rate — 20.00% more. 144 Hz vs 120 Hz.
Why OnePlus 15 wins
- ▲Wireless charging — 233.33% more. 50 W vs 15 W.
- ▲Wired charging — 84.62% more. 120 W vs 65 W.
- ▲AnTuTu — 42.51% more. 2950000 vs 2070000.
- ▲Battery capacity — 36.36% more. 7500 mAh vs 5500 mAh.
- ▲Pixel density — 15.98% more. 450 ppi vs 388 ppi.
- ▲Weight — 13.00 g less. 211 vs 224.
- ▲Water resistance: IP69 (vs IP68).
- ▲Promised OS updates: 5 (vs 2).
Spec comparison
Design
| Spec | ASUS - Zenfone 11 Ultra | OnePlus 15 |
|---|---|---|
| Weight | 224 g | 211 glead |
| Thickness | 8.9 mm | 8.3 mmlead |
| Water resistanceⓘ | IP68 | IP69lead |
| Form factor | bar | bar |
Display
| Spec | ASUS - Zenfone 11 Ultra | OnePlus 15 |
|---|---|---|
| Screen size | 6.78 " | 6.78 " |
| Pixel densityⓘ | 388 ppi | 450 ppilead |
| Refresh rateⓘ | 144 Hzlead | 120 Hz |
| Peak brightnessⓘ | 2500 nits | 4500 nitslead |
Performance
| Spec | ASUS - Zenfone 11 Ultra | OnePlus 15 |
|---|---|---|
| RAMⓘ | 16 GB | 16 GB |
| Storageⓘ | 512 GB | 512 GB |
| AnTuTuⓘ | 2070000 | 2950000lead |
| CPU total clockⓘ | 21.4 GHz | 23.6 GHzlead |
Cameras
| Spec | ASUS - Zenfone 11 Ultra | OnePlus 15 |
|---|---|---|
| Main cameraⓘ | 50 MP | 50 MP |
| Front camera | 32 MP | 32 MP |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | ASUS - Zenfone 11 Ultra | OnePlus 15 |
|---|---|---|
| Battery capacityⓘ | 5500 mAh | 7500 mAhlead |
| Wired chargingⓘ | 65 W | 120 Wlead |
| Wireless chargingⓘ | 15 W | 50 Wlead |
Connectivity
| Spec | ASUS - Zenfone 11 Ultra | OnePlus 15 |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | false |
| microSD slot | false | false |
Operating System
| Spec | ASUS - Zenfone 11 Ultra | OnePlus 15 |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 2 years | 5 yearslead |
Frequently asked
Which has better battery, Zenfone 11 Ultra or OnePlus 15?+
OnePlus 15 has 36.4% more battery — 5500 mAh vs 7500 mAh.
Which is lighter, Zenfone 11 Ultra or OnePlus 15?+
OnePlus 15 is 13g lighter — 224g vs 211g.
Is Zenfone 11 Ultra waterproof?+
Zenfone 11 Ultra has an IP68 rating.
Does OnePlus 15 support 5G?+
Yes, OnePlus 15 supports 5G.
Which has a better camera, Zenfone 11 Ultra or OnePlus 15?+
OnePlus 15 has a 50 MP main camera vs 50 MP.