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 | 4900 mAh | 7500 mAh |
| AnTuTu | 2200000 | 2950000 |
| RAM | 12 GB | 16 GB |
Between the Galaxy S26+ and OnePlus 15, the Galaxy S26+ comes out ahead in weight / pixel density, while the OnePlus 15 wins on wireless charging / wired charging. Overall, the Galaxy S26+ scores 69.4 and the OnePlus 15 scores 76.7 on our Mars Score.
Which should you buy?
The OnePlus 15 edges ahead on the Mars Score (69.4 vs 76.7), but the 7.3-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Galaxy S26+ 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 weight, pixel density, promised os updates. The single most decisive one: Weight — 15.00 g less. 196 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 7.3 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, pixel density ppi, 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 — 15.00 g less. 196 vs 211.
- ▲Pixel density — 14.00% more. 513 ppi vs 450 ppi.
- ▲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 — 53.06% more. 7500 mAh vs 4900 mAh.
- ▲AnTuTu — 34.09% more. 2950000 vs 2200000.
- ▲RAM — 33.33% more. 16 GB vs 12 GB.
- ▲Screen size — 1.19% more. 6.78 " vs 6.7 ".
- ▲Water resistance: IP69 (vs IP68).
Spec comparison
Design
| Spec | Samsung - Galaxy S26+ | OnePlus 15 |
|---|---|---|
| Weight | 196 glead | 211 g |
| Thickness | 7.6 mmlead | 8.3 mm |
| Water resistanceⓘ | IP68 | IP69lead |
| Form factor | bar | bar |
Display
| Spec | Samsung - Galaxy S26+ | OnePlus 15 |
|---|---|---|
| Screen size | 6.7 " | 6.78 "lead |
| Pixel densityⓘ | 513 ppilead | 450 ppi |
| Refresh rateⓘ | 120 Hz | 120 Hz |
| Peak brightnessⓘ | 2600 nits | 4500 nitslead |
Performance
| Spec | Samsung - Galaxy S26+ | OnePlus 15 |
|---|---|---|
| RAMⓘ | 12 GB | 16 GBlead |
| Storageⓘ | 256 GB | 512 GBlead |
| AnTuTuⓘ | 2200000 | 2950000lead |
| CPU total clockⓘ | 22.4 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ⓘ | 4900 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 53.1% more battery — 4900 mAh vs 7500 mAh.
Which is lighter, Galaxy S26+ or OnePlus 15?+
Galaxy S26+ is 15g lighter — 196g 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.