OnePlus 15 vs Galaxy S25
The OnePlus 15 and the Galaxy S25 sit in the same flagship smartphone class, but OnePlus and Samsung don’t always agree on what matters most. The numbers lean one way: the OnePlus 15 comes out ahead in 4 of the 6 areas we compared, with its clearest lead in the battery & charging category.
At a glance
- Display OnePlus 15 wins
- Performance Tie
- Memory & Storage OnePlus 15 wins
- Camera OnePlus 15 wins
- Battery & Charging OnePlus 15 wins
- Software & Updates Galaxy S25 wins
- Price Galaxy S25 wins
- Display10.0
- Performance5.9
- Camera3.5
- Battery & Charging9.3
- Display6.8
- Performance5.9
- Camera1.4
- Battery & Charging0.7
Spec scores (0 to 10) are calculated from manufacturer specs against other models in the same class. See how the formula works. They are not reviews or user ratings.
Key Differences
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The OnePlus 15 has 83% more battery capacity
A clear win for the OnePlus 15: 7,300 mAh against 4,000 mAh. Few specs in this matchup are as one-sided. A bigger battery usually means longer days between charges, although chip efficiency and screen size also shape real endurance.
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The Galaxy S25 has 3 years of extra promised updates
Here the Galaxy S25 pulls well ahead of the OnePlus 15, with 7 years compared to 4 years. The Galaxy S25’s longer software support can also help its resale value later on.
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The OnePlus 15 has a 165 Hz display instead of 120 Hz
The OnePlus 15 doesn’t just edge this one; 165 Hz against 120 Hz is a lead you’ll feel. Smoother motion is one of the most visible display upgrades, and adaptive high-refresh panels can slow down on static content to save power.
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The Galaxy S25 has a 1.73 oz lighter build
Big gap, real consequences. The Galaxy S25’s 5.71 oz versus the OnePlus 15’s 7.44 oz changes how the two compare in daily use. A few grams won’t matter, but bigger gaps add up in a pocket or a small bag over a full day.
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The OnePlus 15 has 256 GB of base storage instead of 128 GB
The Galaxy S25 is clearly behind on base storage (128 GB against 256 GB), and that’s one of its biggest weak spots in this matchup. If you shoot a lot of video or keep music and maps offline, base storage is one of the specs you’ll feel most over the years.
Design & Size
- OnePlus 15 6.35 in × 3.02 in × 0.32 in
- Galaxy S25 5.78 in × 2.78 in × 0.28 in
In overall size, the OnePlus 15 is ahead, which is good news only if a bigger phone is what you want. Pick the Galaxy S25 and you save 1.73 oz. If a thin profile matters to you, the Galaxy S25 is 0.04 in slimmer.
Design & Build
| Spec | OnePlus 15 | Galaxy S25 |
|---|---|---|
| Height | 6.35 in | 5.78 in |
| Width | 3.02 in | 2.78 in |
| Thickness | 0.32 in | 0.28 in (winner) |
| Weight | 7.44 oz | 5.71 oz (winner) |
| Water & dust rating | IP68/IP69 (winner) | IP68 |
| Frame | Aluminum | Armor Aluminum |
Display
OnePlus 15 leads
The display comparison is one-sided. The OnePlus 15 leads where it counts. Choose the OnePlus 15 and you get a 165 Hz display instead of 120 Hz. A higher refresh rate makes scrolling, animations and games look smoother. Once you’re used to it, a lower-rate screen can feel sluggish by comparison. That makes the OnePlus 15 the natural choice for buyers focused on display.
Refresh rate
OnePlus 15: 165 Hz Galaxy S25: 120 Hz You notice refresh rate every time you scroll a feed or a web page, which is why the OnePlus 15 feels more fluid in everyday use.
Screen size
OnePlus 15: 6.8 in Galaxy S25: 6.2 in A bigger screen makes reading, video and maps more comfortable, while a smaller one is easier to use with one hand and slips into more pockets.
Performance
Too close to call
The differences on performance are small enough to ignore in daily use. Net result on performance: level.
Memory & Storage
OnePlus 15 leads
Here the OnePlus 15 opens up one of its biggest leads in the comparison. The OnePlus 15 stands out with 256 GB of base storage instead of 128 GB. The OnePlus 15 starts with more room, which means fewer “storage full” warnings and less time deleting old videos. If this section decides it for you, choose the OnePlus 15.
Base storage
OnePlus 15: 256 GB Galaxy S25: 128 GB Base storage is what you get without paying extra. Photos, videos and apps add up quickly, so more space at the entry price is real value.
Camera
OnePlus 15 leads
On camera, the gap between these two is wide, and it favors the OnePlus 15. Point to the OnePlus 15 for a dedicated 50 MP telephoto camera. A dedicated telephoto camera captures distant subjects and portraits without heavy cropping, which keeps detail intact. Weighing only camera, the OnePlus 15 comes out ahead.
Telephoto camera
OnePlus 15: 50 MP Galaxy S25: 10 MP A higher-resolution telephoto keeps more detail when you zoom, and gives the OnePlus 15 a stronger tool for portraits and distant subjects.
Optical zoom
OnePlus 15: 3.5× Galaxy S25: 3× The OnePlus 15 reaches further with real optics, which pays off for wildlife, stages and sports from the stands.
Battery & Charging
OnePlus 15 leads
The OnePlus 15 is the clear pick if battery & charging is what you care about most. The OnePlus 15 steps ahead thanks to 83% more battery capacity. Extra capacity also ages better: after a few years of charge cycles, the OnePlus 15 has more headroom left. For battery & charging, the OnePlus 15 is the one to beat.
Battery capacity
OnePlus 15: 7,300 mAh Galaxy S25: 4,000 mAh Capacity isn’t everything, but when two phones are otherwise close, more milliamp-hours is the simplest endurance advantage there is.
Wired charging
OnePlus 15: 120 W Galaxy S25: 25 W Faster wired charging means a short top-up before you head out goes further.
Software & Updates
Galaxy S25 leads
The OnePlus 15 has a tough time in the software & updates section, where the Galaxy S25 pulls well ahead. The Galaxy S25 brings 3 years of extra promised updates. Software support is what separates a phone that ages gracefully from one that doesn’t, making it one of the most practical lines on the spec sheet. On software & updates alone, the Galaxy S25 gets the nod.
Promised OS updates
OnePlus 15: 4 years Galaxy S25: 7 years A longer update promise keeps the phone secure and current for longer, which matters if you keep devices for several years.
Full Specifications
Display
| Spec | OnePlus 15 | Galaxy S25 |
|---|---|---|
| Screen size | 6.8 in | 6.2 in |
| Panel type | LTPO AMOLED | Dynamic AMOLED 2X |
| Resolution | 2772 x 1272 | 2340 x 1080 |
| Pixel density | N/A (not specified) | 416 ppi |
| Refresh rate | 165 Hz (winner) Smoothest display in class | 120 Hz |
| Peak brightness | N/A (not specified) | 2,600 nits |
| Always-on display | Yes | Yes |
Performance
| Spec | OnePlus 15 | Galaxy S25 |
|---|---|---|
| Chipset | Snapdragon 8 Elite Gen 5 | Snapdragon 8 Elite for Galaxy |
| CPU cores | 8 | 8 |
| Process node | 3 nm | 3 nm |
| RAM | 12 GB | 12 GB |
Memory & Storage
| Spec | OnePlus 15 | Galaxy S25 |
|---|---|---|
| Base storage | 256 GB (winner) | 128 GB |
| Max storage | 512 GB | N/A (not specified) |
| microSD slot | No | No |
Camera
| Spec | OnePlus 15 | Galaxy S25 |
|---|---|---|
| Main camera | 50 MP | 50 MP |
| Ultra-wide camera | 50 MP (winner) | 12 MP |
| Telephoto camera | 50 MP (winner) | 10 MP |
| Optical zoom | 3.5× (winner) | 3× |
| Rear cameras | 3 | 3 |
| Front camera | 32 MP (winner) | 12 MP |
| Max video | N/A (not specified) | 8K30 |
Battery & Charging
| Spec | OnePlus 15 | Galaxy S25 |
|---|---|---|
| Battery capacity | 7,300 mAh (winner) Biggest battery in class | 4,000 mAh |
| Wired charging | 120 W (winner) Fastest wired charging | 25 W |
| Wireless charging | 50 W (winner) | 15 W |
| Port | USB-C (USB 3.2) | USB-C |
Software & Updates
| Spec | OnePlus 15 | Galaxy S25 |
|---|---|---|
| OS at launch | OxygenOS 16 (Android 16) | Android 15 (One UI 7) |
| Promised OS updatesManufacturer commitment | 4 years | 7 years (winner) |
Design & Build
| Spec | OnePlus 15 | Galaxy S25 |
|---|---|---|
| Height | 6.35 in | 5.78 in |
| Width | 3.02 in | 2.78 in |
| Thickness | 0.32 in | 0.28 in (winner) |
| Weight | 7.44 oz | 5.71 oz (winner) |
| Water & dust rating | IP68/IP69 (winner) | IP68 |
| Frame | Aluminum | Armor Aluminum |
Price
| Spec | OnePlus 15 | Galaxy S25 |
|---|---|---|
| Launch price | $900 | $800 (winner) |
“N/A” means the manufacturer does not specify the value or we could not confirm it. Figures marked “manufacturer rating” are the maker’s own claims, not our measurements.
Price & Value
A price gap of $100 at launch won’t make or break this decision. If $100 isn’t a stretch, the OnePlus 15 gives you 83% more battery capacity and a 165 Hz display instead of 120 Hz.
Launch prices in the US as of November 2025; street prices move, so check before you buy.
Which One Should You Buy?
Choose the OnePlus 15 if…
- you often spend long days away from a charger (7,300 mAh vs 4,000 mAh)
- you game or scroll a lot and like motion to look fluid (165 Hz vs 120 Hz)
- you shoot a lot of photos and video (256 GB vs 128 GB base storage)
- you want the stronger telephoto camera (50 MP vs 10 MP)
Choose the Galaxy S25 if…
- you want software support that lasts longer (7 years vs 4 years)
- you notice every gram in your pocket (5.71 oz vs 7.44 oz)
- you care about a thin profile in your pocket (0.28 in vs 0.32 in)
- you want the lower price and can live with the trade-offs ($100 less)
Also Compared
Frequently Asked Questions
Which is better for most people, the OnePlus 15 or the Galaxy S25?
We’d point most buyers to the OnePlus 15. The main exception is if you’d trade the rest for 3 years of extra promised updates.
Which has better battery life, the OnePlus 15 or the Galaxy S25?
On paper, the OnePlus 15 has the edge: 7,300 mAh of battery capacity against 4,000 mAh for the Galaxy S25. Real-world results also depend on how you use it.
Which is larger, the OnePlus 15 or the Galaxy S25?
The Galaxy S25 is actually the more compact one. It measures 5.78 × 2.78 × 0.28 in, while the OnePlus 15 comes in at 6.35 × 3.02 × 0.32 in.
Does the OnePlus 15 have a stronger camera setup than the Galaxy S25?
Going by the hardware, the OnePlus 15 comes out ahead: a dedicated 50 MP telephoto camera and 3.5× optical zoom versus 3×.
Is the OnePlus 15’s display better than the Galaxy S25’s?
The OnePlus 15 has the stronger display on paper, with a 165 Hz display instead of 120 Hz.
Is the OnePlus 15 cheaper than the Galaxy S25?
The OnePlus 15 launched at $100 more than the Galaxy S25, based on prices as of November 2025.
Executive Summary
I don’t have a favorite brand in this fight between the OnePlus 15 and the Galaxy S25. I just have opinions about the numbers. The OnePlus 15 wins me over with 83% more battery capacity. Nor should you ignore that the OnePlus 15 has a 165 Hz display instead of 120 Hz. That said, the Galaxy S25 answers with 3 years of extra promised updates, which some people will value more.
The OnePlus 15 is built for people who weigh display heavily, and the Galaxy S25 for people who weigh software & updates.
My pick: the OnePlus 15 is the sensible default. Only one thing changes that: if having 3 years of extra promised updates matters more to you than the rest.
Personal opinion based on the data above. Your priorities may differ.