OnePlus 15 vs Galaxy S25+
The OnePlus 15 and the Galaxy S25+ are two different answers to the same flagship smartphone brief, each with its own set of priorities. The spec sheets tilt toward the OnePlus 15, which leads in 3 of 6 areas and opens its biggest gap on battery & charging.
At a glance
- Display OnePlus 15 wins
- Performance Tie
- Memory & Storage Tie
- Camera OnePlus 15 wins
- Battery & Charging OnePlus 15 wins
- Software & Updates Galaxy S25+ wins
- Price OnePlus 15 wins
- Display10.0
- Performance5.9
- Memory & Storage3.6
- Camera3.5
- Battery & Charging9.3
- Display6.8
- Performance5.9
- Memory & Storage3.6
- Camera1.4
- Battery & Charging2.6
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 Galaxy S25+ has 3 years of extra promised updates
This is one of the widest gaps in the whole comparison: 7 years for the Galaxy S25+ versus 4 years for the OnePlus 15. A longer update promise keeps the phone secure and current for longer, which matters if you keep devices for several years.
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The OnePlus 15 has 49% more battery capacity
The Galaxy S25+ lists 4,900 mAh; the OnePlus 15 comes in at 7,300 mAh. That’s not a rounding error. Capacity isn’t everything, but when two phones are otherwise close, more milliamp-hours is the simplest endurance advantage there is.
-
The OnePlus 15 has a 165 Hz display instead of 120 Hz
At 165 Hz versus 120 Hz, this is a decisive lead for the OnePlus 15, the kind of difference you notice without looking for it. 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 OnePlus 15 has a dedicated 50 MP telephoto camera
If telephoto camera is one of your priorities, this settles it: the OnePlus 15 leads clearly with 50 MP to the Galaxy S25+’s 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.
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The OnePlus 15 has faster 120 W wired charging
The numbers aren’t close. The OnePlus 15 lists 120 W for wired charging, while the Galaxy S25+ lists 45 W. Peak charging speeds depend on a compatible charger, which may not come in the box.
Design & Size
- OnePlus 15 6.35 in × 3.02 in × 0.32 in
- Galaxy S25+ 6.24 in × 2.98 in × 0.29 in
Size-wise, the OnePlus 15 takes up more space, and the Galaxy S25+ is easier to fit where room is tight. The Galaxy S25+ saves 0.74 oz. How much that matters depends on how you use it. The Galaxy S25+ trims 0.03 in off the thickness of the OnePlus 15.
Design & Build
| Spec | OnePlus 15 | Galaxy S25+ |
|---|---|---|
| Height | 6.35 in | 6.24 in |
| Width | 3.02 in | 2.98 in |
| Thickness | 0.32 in | 0.29 in (winner) |
| Weight | 7.44 oz | 6.70 oz (winner) |
| Water & dust rating | IP68/IP69 (winner) | IP68 |
| Frame | Aluminum | Armor Aluminum |
Display
OnePlus 15 leads
The OnePlus 15 dominates the display section, and the gaps are large enough to matter in daily use. On the OnePlus 15, 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. Prioritize display, and the OnePlus 15 is where you should land.
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.
Performance
Too close to call
If performance matters most to you, this section won’t make the decision for you: they’re level. Bottom line for performance: it’s a wash.
Memory & Storage
Too close to call
Side by side, the memory & storage figures for the OnePlus 15 and the Galaxy S25+ barely differ. Net result on memory & storage: level.
Camera
OnePlus 15 leads
The Galaxy S25+ has a tough time in the camera section, where the OnePlus 15 pulls well ahead. The OnePlus 15 pulls ahead with a dedicated 50 MP telephoto camera. Telephoto lenses earn their keep at concerts, school events and portraits: anywhere you can’t simply walk closer. Net result: the OnePlus 15 leads this part of the comparison.
Telephoto camera
OnePlus 15: 50 MP Galaxy S25+: 10 MP A dedicated telephoto camera captures distant subjects and portraits without heavy cropping, which keeps detail intact.
Optical zoom
OnePlus 15: 3.5× Galaxy S25+: 3× Digital zoom can fake reach, but optical zoom is where the detail actually comes from.
Battery & Charging
OnePlus 15 leads
This section belongs to the OnePlus 15. In battery & charging, it leads the Galaxy S25+ by a margin that’s hard to ignore. The OnePlus 15 answers with 49% 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+: 4,900 mAh A bigger battery usually means longer days between charges, although chip efficiency and screen size also shape real endurance.
Wired charging
OnePlus 15: 120 W Galaxy S25+: 45 W Faster wired charging means a short top-up before you head out goes further.
Software & Updates
Galaxy S25+ leads
In this area the Galaxy S25+ has a lead the OnePlus 15 can’t close. The Galaxy S25+ takes this one with 3 years of extra promised updates. The Galaxy S25+’s longer software support can also help its resale value later on. So if software & updates tops your list, lean toward the Galaxy S25+.
Promised OS updates
OnePlus 15: 4 years Galaxy S25+: 7 years 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.
Full Specifications
Display
| Spec | OnePlus 15 | Galaxy S25+ |
|---|---|---|
| Screen size | 6.8 in | 6.7 in |
| Panel type | LTPO AMOLED | Dynamic AMOLED 2X |
| Resolution | 2772 x 1272 | 3120 x 1440 |
| Pixel density | N/A (not specified) | 513 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 | 256 GB |
| Max storage | 512 GB | 512 GB |
| 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 | 4,900 mAh |
| Wired charging | 120 W (winner) Fastest wired charging | 45 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 | 6.24 in |
| Width | 3.02 in | 2.98 in |
| Thickness | 0.32 in | 0.29 in (winner) |
| Weight | 7.44 oz | 6.70 oz (winner) |
| Water & dust rating | IP68/IP69 (winner) | IP68 |
| Frame | Aluminum | Armor Aluminum |
Price
| Spec | OnePlus 15 | Galaxy S25+ |
|---|---|---|
| Launch price | $900 (winner) | $1,000 |
“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
Only $100 separated these two at launch, in favor of the OnePlus 15. The Galaxy S25+’s extra $100 is hard to justify when the OnePlus 15 leads in more areas.
Based on US launch pricing as of November 2025. Deals and regional pricing can change the picture.
Which One Should You Buy?
Choose the OnePlus 15 if…
- you often spend long days away from a charger (7,300 mAh vs 4,900 mAh)
- you want smoother scrolling (165 Hz vs 120 Hz)
- you take lots of portraits and zoomed shots (50 MP vs 10 MP telephoto)
- you want the faster cable charging (120 W vs 45 W)
- you’re working to a firm budget and $100 matters
Choose the Galaxy S25+ if…
- you plan to keep your phone for years (7 years vs 4 years of promised updates)
- you want the lighter phone (6.70 oz vs 7.44 oz)
- you want the slimmer phone (0.29 in vs 0.32 in)
Also Compared
Frequently Asked Questions
Should I buy the OnePlus 15 or the Galaxy S25+?
For most people, the OnePlus 15 is the stronger choice, unless you specifically want 3 years of extra promised updates, where the Galaxy S25+ has the edge.
Which has better battery life, the OnePlus 15 or the Galaxy S25+?
Going by the official figures, the OnePlus 15 leads: 7,300 mAh versus 4,900 mAh for battery capacity. Screen use, settings and efficiency will shape your own results.
Is the OnePlus 15 bigger than the Galaxy S25+?
The Galaxy S25+ is actually the more compact one. It measures 6.24 × 2.98 × 0.29 in, while the OnePlus 15 comes in at 6.35 × 3.02 × 0.32 in.
Which has the better camera, the OnePlus 15 or 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?
Going by the numbers, the OnePlus 15’s screen comes out ahead: a 165 Hz display instead of 120 Hz.
Is the OnePlus 15 cheaper than the Galaxy S25+?
The OnePlus 15 is the cheaper option, launching at $100 less than the Galaxy S25+ (launch prices as of November 2025).
Executive Summary
OnePlus or Samsung? For a lot of people, the question really comes down to the OnePlus 15 versus the Galaxy S25+. The OnePlus 15 earns my vote first and foremost with 49% more battery capacity. There’s a bonus as well: the OnePlus 15 has a 165 Hz display instead of 120 Hz. The Galaxy S25+ has a trump card of its own in 3 years of extra promised updates.
Match the strength to your habits (display for the OnePlus 15, software & updates for the Galaxy S25+), and you won’t go far wrong.
My pick: the OnePlus 15 is the sensible default. Only one thing changes that: if you care more about 3 years of extra promised updates than anything else.
Personal opinion based on the data above. Your priorities may differ.