Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | OnePlus 15 | Google - Pixel 9a |
|---|---|---|
| Wireless charging | 50 W | 7.5 W |
| Wired charging | 120 W | 23 W |
| Front camera | 32 MP | 13 MP |
| AnTuTu | 2950000 | 1240000 |
| RAM | 16 GB | 8 GB |
| Battery capacity | 7500 mAh | 5100 mAh |
Between the OnePlus 15 and Pixel 9a, the OnePlus 15 comes out ahead in wireless charging / wired charging, while the Pixel 9a wins on weight / promised os updates. Overall, the OnePlus 15 scores 76.7 and the Pixel 9a scores 65.3 on our Mars Score.
Which should you buy?
The OnePlus 15 is the clear pick on raw spec strength, leading by 11.4 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the OnePlus 15 if you photograph or shoot video regularly and want the better imaging pipeline of the two. The biggest gaps in its favor are wireless charging, wired charging, front camera, among others. The single most decisive one: Wireless charging — 566.67% more. 50 W vs 7.5 W.
Pick the Pixel 9a if you carry the device everywhere and weight or thickness has been the deciding factor before. Its strongest claims are weight, promised os updates. The single most decisive one: Weight — 25.00 g less. 186 vs 211.
Both ship with comparable refresh rate, 5g support, optical image stabilization, 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 Google - Pixel 9a?
OnePlus 15 leads the current Mars Score by 11.4 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 wireless charging w, wired charging w, front cam mp.
Choose Google - Pixel 9a if…
Google - Pixel 9a has the measurable edge on weight g, promised os years.
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
- ▲Wireless charging — 566.67% more. 50 W vs 7.5 W.
- ▲Wired charging — 421.74% more. 120 W vs 23 W.
- ▲Front camera — 146.15% more. 32 MP vs 13 MP.
- ▲AnTuTu — 137.90% more. 2950000 vs 1240000.
- ▲RAM — 100.00% more. 16 GB vs 8 GB.
- ▲Battery capacity — 47.06% more. 7500 mAh vs 5100 mAh.
- ▲Screen size — 7.62% more. 6.78 " vs 6.3 ".
- ▲Pixel density — 6.64% more. 450 ppi vs 422 ppi.
Why Google - Pixel 9a wins
- ▲Weight — 25.00 g less. 186 vs 211.
- ▲Promised OS updates: 7 (vs 5).
Spec comparison
Design
| Spec | OnePlus 15 | Google - Pixel 9a |
|---|---|---|
| Weight | 211 g | 186 glead |
| Thickness | 8.3 mmlead | 8.9 mm |
| Water resistanceⓘ | IP69lead | IP68 |
| Form factor | bar | bar |
Display
| Spec | OnePlus 15 | Google - Pixel 9a |
|---|---|---|
| Screen size | 6.78 "lead | 6.3 " |
| Pixel densityⓘ | 450 ppilead | 422 ppi |
| Refresh rateⓘ | 120 Hz | 120 Hz |
| Peak brightnessⓘ | 4500 nitslead | 2700 nits |
Performance
| Spec | OnePlus 15 | Google - Pixel 9a |
|---|---|---|
| RAMⓘ | 16 GBlead | 8 GB |
| Storageⓘ | 512 GBlead | 128 GB |
| AnTuTuⓘ | 2950000lead | 1240000 |
| CPU total clockⓘ | 23.6 GHzlead | 14.6 GHz |
Cameras
| Spec | OnePlus 15 | Google - Pixel 9a |
|---|---|---|
| Main cameraⓘ | 50 MPlead | 48 MP |
| Front camera | 32 MPlead | 13 MP |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | OnePlus 15 | Google - Pixel 9a |
|---|---|---|
| Battery capacityⓘ | 7500 mAhlead | 5100 mAh |
| Wired chargingⓘ | 120 Wlead | 23 W |
| Wireless chargingⓘ | 50 Wlead | 7.5 W |
Connectivity
| Spec | OnePlus 15 | Google - Pixel 9a |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | false |
| microSD slot | false | false |
Operating System
| Spec | OnePlus 15 | Google - Pixel 9a |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 5 years | 7 yearslead |
Frequently asked
Which has better battery, OnePlus 15 or Pixel 9a?+
OnePlus 15 has 47.1% more battery — 7500 mAh vs 5100 mAh.
Which is lighter, OnePlus 15 or Pixel 9a?+
Pixel 9a is 25g lighter — 211g vs 186g.
Is OnePlus 15 waterproof?+
OnePlus 15 has an IP69 rating.
Does Pixel 9a support 5G?+
Yes, Pixel 9a supports 5G.
Which has more RAM, OnePlus 15 or Pixel 9a?+
OnePlus 15 offers 16GB of RAM.
Which has a better camera, OnePlus 15 or Pixel 9a?+
OnePlus 15 has a 50 MP main camera vs 48 MP.