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OnePlus 15 Ultra vs Samsung Galaxy S25 Ultra: specs, performance & best pick
Detailed comparison between OnePlus 15 Ultra and Samsung Galaxy S25 Ultra with specs, performance, battery, cameras, pros & cons, FAQs and editorial verdict to help you choose the ultimate Android flagship.
Updated: 2025-12-22
Buyer guide
OnePlus 15 Ultra
- You want the best battery life and the latest Snapdragon Gen 5 performance.
- Gaming and high refresh rate display are priorities.
- You value faster wired and wireless charging.
Samsung Galaxy S25 Ultra
- You want the most versatile camera system available.
- You prefer a larger, bright display for media and productivity.
- One UI feature richness is important.
Quick rule: Pick OnePlus 15 Ultra if battery life, gaming and display responsiveness matter most; pick Samsung Galaxy S25 Ultra if camera versatility and larger display are top-priority features.
OnePlus 15 Ultra
FLIPKART • MOBHHNFYHUT4PYEW
Flagship Android • 12/16 GB • 256/512 GB • Android 16 (OxygenOS)
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View detailsBuy
Samsung Galaxy S25 Ultra
FLIPKART • MOBHE3GH87GTJNFZ
Flagship Android • 12/16 GB • 256/512 GB, 1 TB • Android 15 (One UI 7)
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View detailsBuy
Price-to-performance score
OnePlus 15 Ultra
9.1/10
Strong performance, massive battery, and display refresh rate shine for gaming and daily use. :contentReference[oaicite:15]{index=15}
Samsung Galaxy S25 Ultra
8.9/10
Excellent camera hardware and flagship features with a premium display. :contentReference[oaicite:16]{index=16}
Price comparison
OnePlus 15 Ultra
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Samsung Galaxy S25 Ultra
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Quick comparison
performance
OnePlus 15 Ultra
Snapdragon 8 Elite Gen 5 with higher peak clocks and newer architecture, optimized for gaming and sustained performance. :contentReference[oaicite:1]{index=1}
Samsung Galaxy S25 Ultra
Snapdragon 8 Elite (Gen 4 for Galaxy) paired with One UI 7 offers robust performance, particularly in productivity and balanced battery efficiency. :contentReference[oaicite:2]{index=2}
display
OnePlus 15 Ultra
6.78" LTPO AMOLED, up to 165 Hz refresh rate for buttery smooth visuals. :contentReference[oaicite:4]{index=4}
Samsung Galaxy S25 Ultra
6.9" Dynamic LTPO AMOLED 2X with adaptive 120 Hz and extremely high peak brightness. :contentReference[oaicite:5]{index=5}
camera
OnePlus 15 Ultra
Triple 50 MP system with wide, ultra-wide and 3.5× optical zoom — good depth and versatility in zoom range. :contentReference[oaicite:7]{index=7}
Samsung Galaxy S25 Ultra
Quad camera array with 200 MP primary sensor, multiple telephoto lenses up to 5× optical zoom and ultra-wide — excellent for zoom and detail. :contentReference[oaicite:8]{index=8}
battery and charging
OnePlus 15 Ultra
Large 7,300 mAh silicon-carbon battery with 120W wired and 50W wireless charging, leading in endurance. :contentReference[oaicite:10]{index=10}
Samsung Galaxy S25 Ultra
5,000 mAh battery with 45W wired and Qi2 wireless charging — strong all-day use but shorter life than OnePlus. :contentReference[oaicite:11]{index=11}
software
OnePlus 15 Ultra
OxygenOS on Android 16 offers clean UI with gaming and performance optimizations. :contentReference[oaicite:13]{index=13}
Samsung Galaxy S25 Ultra
One UI 7 on Android 15 provides rich features and deep customization. :contentReference[oaicite:14]{index=14}
Highlights table
| Feature | OnePlus 15 Ultra — | Samsung Galaxy S25 Ultra — |
|---|---|---|
| Processor | Snapdragon 8 Elite Gen 5 | Snapdragon 8 Elite (Gen 4 for Galaxy) |
| Display | 6.78" AMOLED, 165 Hz | 6.9" AMOLED, 120 Hz |
| Battery | 7,300 mAh | 5,000 mAh |
| Rear Cameras | Triple 50 MP | Quad 200 MP + others |
| OS | Android 16 (OxygenOS) | Android 15 (One UI 7) |
Pros & Cons
OnePlus 15 Ultra
Pros
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Cons
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Samsung Galaxy S25 Ultra
Pros
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Cons
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Full specifications comparison
Specs are fetched live from the item endpoint and rendered as “Section • Attribute”.
| Feature | OnePlus 15 Ultra | Samsung Galaxy S25 Ultra |
|---|
FAQ
Which phone has better battery life?
The OnePlus 15 Ultra typically outlasts the Galaxy S25 Ultra thanks to its larger 7,300 mAh battery and fast charging support. :contentReference[oaicite:17]{index=17}
Which phone has superior camera capabilities?
The Galaxy S25 Ultra has an edge in camera hardware with a 200 MP main sensor and multiple telephoto options, while the OnePlus 15 Ultra relies on versatile 50 MP cameras. :contentReference[oaicite:18]{index=18}
Is the OnePlus 15 Ultra better for gaming?
Yes — its Snapdragon 8 Elite Gen 5 and higher display refresh rate make it slightly better positioned for high-performance gaming. :contentReference[oaicite:19]{index=19}
Verdict
Both the OnePlus 15 Ultra and Samsung Galaxy S25 Ultra are excellent flagship phones. The OnePlus offers cutting-edge performance, massive battery capacity, and fast charging, while the Samsung excels in camera versatility, display size, and feature-rich One UI.