Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Samsung - Galaxy S26 | OnePlus 15 |
|---|---|---|
| Wireless charging | 15 W | 50 W |
| Wired charging | 45 W | 120 W |
| Front camera | 12 MP | 32 MP |
| Battery capacity | 4000 mAh | 7500 mAh |
| Weight | 168 g | 211 g |
| AnTuTu | 2150000 | 2950000 |
Between the Galaxy S26 and OnePlus 15, the Galaxy S26 comes out ahead in weight / promised os updates, while the OnePlus 15 wins on wireless charging / wired charging. Overall, the Galaxy S26 scores 67.3 and the OnePlus 15 scores 76.7 on our Mars Score.
Which should you buy?
The OnePlus 15 is the clear pick on raw spec strength, leading by 9.4 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 Galaxy S26 if you carry the device everywhere and weight or thickness has been the deciding factor before. The biggest gaps in its favor are weight, promised os updates. The single most decisive one: Weight — 43.00 g less. 168 vs 211.
Pick the OnePlus 15 if you photograph or shoot video regularly and want the better imaging pipeline of the two. Its strongest claims are wireless charging, wired charging, front camera, among others. The single most decisive one: Wireless charging — 233.33% more. 50 W vs 15 W.
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: Samsung - Galaxy S26 or OnePlus 15?
OnePlus 15 leads the current Mars Score by 9.4 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 Samsung - Galaxy S26 if…
Samsung - Galaxy S26 has the measurable edge on weight g, promised os years.
Choose OnePlus 15 if…
OnePlus 15 has the measurable edge on wireless charging w, wired charging w, front cam mp.
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 Samsung - Galaxy S26 wins
- ▲Weight — 43.00 g less. 168 vs 211.
- ▲Promised OS updates: 7 (vs 5).
Why OnePlus 15 wins
- ▲Wireless charging — 233.33% more. 50 W vs 15 W.
- ▲Wired charging — 166.67% more. 120 W vs 45 W.
- ▲Front camera — 166.67% more. 32 MP vs 12 MP.
- ▲Battery capacity — 87.50% more. 7500 mAh vs 4000 mAh.
- ▲AnTuTu — 37.21% more. 2950000 vs 2150000.
- ▲RAM — 33.33% more. 16 GB vs 12 GB.
- ▲Screen size — 9.35% more. 6.78 " vs 6.2 ".
- ▲Pixel density — 5.88% more. 450 ppi vs 425 ppi.
Spec comparison
Design
| Spec | Samsung - Galaxy S26 | OnePlus 15 |
|---|---|---|
| Weight | 168 glead | 211 g |
| Thickness | 7.4 mmlead | 8.3 mm |
| Water resistanceⓘ | IP68 | IP69lead |
| Form factor | bar | bar |
Display
| Spec | Samsung - Galaxy S26 | OnePlus 15 |
|---|---|---|
| Screen size | 6.2 " | 6.78 "lead |
| Pixel densityⓘ | 425 ppi | 450 ppilead |
| Refresh rateⓘ | 120 Hz | 120 Hz |
| Peak brightnessⓘ | 2400 nits | 4500 nitslead |
Performance
| Spec | Samsung - Galaxy S26 | OnePlus 15 |
|---|---|---|
| RAMⓘ | 12 GB | 16 GBlead |
| Storageⓘ | 256 GB | 512 GBlead |
| AnTuTuⓘ | 2150000 | 2950000lead |
| CPU total clockⓘ | 22.0 GHz | 23.6 GHzlead |
Cameras
| Spec | Samsung - Galaxy S26 | OnePlus 15 |
|---|---|---|
| Main cameraⓘ | 50 MP | 50 MP |
| Front camera | 12 MP | 32 MPlead |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | Samsung - Galaxy S26 | OnePlus 15 |
|---|---|---|
| Battery capacityⓘ | 4000 mAh | 7500 mAhlead |
| Wired chargingⓘ | 45 W | 120 Wlead |
| Wireless chargingⓘ | 15 W | 50 Wlead |
Connectivity
| Spec | Samsung - Galaxy S26 | OnePlus 15 |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | false |
| microSD slot | false | false |
Operating System
| Spec | Samsung - Galaxy S26 | OnePlus 15 |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 7 yearslead | 5 years |
Frequently asked
Which has better battery, Galaxy S26 or OnePlus 15?+
OnePlus 15 has 87.5% more battery — 4000 mAh vs 7500 mAh.
Which is lighter, Galaxy S26 or OnePlus 15?+
Galaxy S26 is 43g lighter — 168g vs 211g.
Is Galaxy S26 waterproof?+
Galaxy S26 has an IP68 rating.
Does OnePlus 15 support 5G?+
Yes, OnePlus 15 supports 5G.
Which has more RAM, Galaxy S26 or OnePlus 15?+
OnePlus 15 offers 16GB of RAM.
Which has a better camera, Galaxy S26 or OnePlus 15?+
OnePlus 15 has a 50 MP main camera vs 50 MP.