Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | OnePlus 15 | Xiaomi - Poco F7 Ultra |
|---|---|---|
| Battery capacity | 7500 mAh | 5300 mAh |
| RAM | 16 GB | 12 GB |
| AnTuTu | 2950000 | 2640000 |
| Screen size | 6.78 " | 6.67 " |
| Weight | 211 g | 212 g |
| Pixel density | 450 ppi | 446 ppi |
Between the OnePlus 15 and Poco F7 Ultra, the OnePlus 15 comes out ahead in battery capacity / ram, while the Poco F7 Ultra wins on several specs. Overall, the OnePlus 15 scores 76.7 and the Poco F7 Ultra scores 69.2 on our Mars Score.
Which should you buy?
The OnePlus 15 edges ahead on the Mars Score (76.7 vs 69.2), but the 7.5-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the OnePlus 15 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 battery capacity, ram, antutu, among others. The single most decisive one: Battery capacity — 41.51% more. 7500 mAh vs 5300 mAh.
The Poco F7 Ultra similarly does not carry a headline advantage on the popular specs — look at the full table for category-specific deltas.
Both ship with comparable main camera, refresh rate, 5g support, 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: OnePlus 15 or Xiaomi - Poco F7 Ultra?
OnePlus 15 leads the current Mars Score by 7.5 points.The more useful decision is the trade-off behind that result: compare screen size, ram, pixel density, battery capacity against the way you will actually use the product.
Choose OnePlus 15 if…
OnePlus 15 has the measurable edge on battery capacity mah, ram gb, antutu score.
Choose Xiaomi - Poco F7 Ultra if…
Xiaomi - Poco F7 Ultra does not lead a decisive measured field here, so choose it for price, ecosystem, design, or availability when those matter more to you.
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 OnePlus 15 wins
- ▲Battery capacity — 41.51% more. 7500 mAh vs 5300 mAh.
- ▲RAM — 33.33% more. 16 GB vs 12 GB.
- ▲AnTuTu — 11.74% more. 2950000 vs 2640000.
- ▲Screen size — 1.65% more. 6.78 " vs 6.67 ".
- ▲Weight — 1.00 g less. 211 vs 212.
- ▲Pixel density — 0.90% more. 450 ppi vs 446 ppi.
- ▲Water resistance: IP69 (vs IP68).
- ▲Promised OS updates: 5 (vs 4).
Why Xiaomi - Poco F7 Ultra wins
- No decisive advantages.
Spec comparison
Design
| Spec | OnePlus 15 | Xiaomi - Poco F7 Ultra |
|---|---|---|
| Weight | 211 glead | 212 g |
| Thickness | 8.3 mmlead | 8.4 mm |
| Water resistanceⓘ | IP69lead | IP68 |
| Form factor | bar | bar |
Display
| Spec | OnePlus 15 | Xiaomi - Poco F7 Ultra |
|---|---|---|
| Screen size | 6.78 "lead | 6.67 " |
| Pixel densityⓘ | 450 ppilead | 446 ppi |
| Refresh rateⓘ | 120 Hz | 120 Hz |
| Peak brightnessⓘ | 4500 nitslead | 3200 nits |
Performance
| Spec | OnePlus 15 | Xiaomi - Poco F7 Ultra |
|---|---|---|
| RAMⓘ | 16 GBlead | 12 GB |
| Storageⓘ | 512 GBlead | 256 GB |
| AnTuTuⓘ | 2950000lead | 2640000 |
| CPU total clockⓘ | 23.6 GHzlead | 22.8 GHz |
Cameras
| Spec | OnePlus 15 | Xiaomi - Poco F7 Ultra |
|---|---|---|
| Main cameraⓘ | 50 MP | 50 MP |
| Front camera | 32 MP | 32 MP |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | OnePlus 15 | Xiaomi - Poco F7 Ultra |
|---|---|---|
| Battery capacityⓘ | 7500 mAhlead | 5300 mAh |
| Wired chargingⓘ | 120 W | 120 W |
| Wireless chargingⓘ | 50 W | 50 W |
Connectivity
| Spec | OnePlus 15 | Xiaomi - Poco F7 Ultra |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | false |
| microSD slot | false | false |
Operating System
| Spec | OnePlus 15 | Xiaomi - Poco F7 Ultra |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 5 yearslead | 4 years |
Frequently asked
Which has better battery, OnePlus 15 or Poco F7 Ultra?+
OnePlus 15 has 41.5% more battery — 7500 mAh vs 5300 mAh.
Which is lighter, OnePlus 15 or Poco F7 Ultra?+
OnePlus 15 is 1g lighter — 211g vs 212g.
Is OnePlus 15 waterproof?+
OnePlus 15 has an IP69 rating.
Does Poco F7 Ultra support 5G?+
Yes, Poco F7 Ultra supports 5G.
Which has more RAM, OnePlus 15 or Poco F7 Ultra?+
OnePlus 15 offers 16GB of RAM.
Which has a better camera, OnePlus 15 or Poco F7 Ultra?+
Poco F7 Ultra has a 50 MP main camera vs 50 MP.