OPPO Find X9 Pro vs Samsung Galaxy S25 Ultra: Specs & Battery Compared

Two Android flagships, two very different ideas of what a business phone should be. Samsung's Galaxy S25 Ultra (January 2025) is still the Android productivity benchmark — S Pen, Samsung Knox, DeX, seven years of updates. OPPO's Find X9 Pro (October 2025) is the new battery king with a 7,500 mAh silicon-carbon cell — 50% more than the Samsung's 5,000 mAh.

Which is the right phone for a UK business buyer in 2026? We are Compare The Networks, the OFCOM-regulated business mobile comparison service. 4.3/5 on Trustpilot, nearly 20 years in the game. Here is the detailed comparison.

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Side-by-Side Specs

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Battery: OPPO Is 50% Bigger

The Find X9 Pro's 7,500 mAh silicon-carbon battery gives it a 50% raw capacity advantage over the Galaxy S25 Ultra's 5,000 mAh cell. The S25 Ultra is no slouch — Samsung's power efficiency is excellent and a full day is easy. But reviewers have reported 10+ hours of screen-on time on the OPPO in mixed use, which the S25 Ultra does not match.

For intensive business users — field engineers, fleet drivers, anyone hotspotting laptops all day — this is the single biggest reason to pick the OPPO. See our OPPO Find X9 Pro battery deep-dive and business mobile for fleet drivers.

Charging

• OPPO Find X9 Pro: 80W SUPERVOOC — empty to full in about an hour.
• Galaxy S25 Ultra: 45W wired — slower despite a smaller battery.

Winner: OPPO Find X9 Pro, decisively.

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Cameras: Two 200MP Sensors, Placed Differently

Both phones have a 200MP sensor — but they are in different positions, which changes the whole character of the camera.

Samsung Galaxy S25 Ultra

The 200MP is on the main camera (1x). Samsung uses pixel binning for bright, detailed standard-range shots and digital crop for zoom. Plus a 50MP 5x periscope, 10MP 3x tele, and a 50MP ultrawide — a full quad rear system with lots of flexibility. S Pen is the killer extra — sign contracts, annotate PDFs, markup site photos.

OPPO Find X9 Pro

The 200MP is on the Hasselblad periscope telephoto. OPPO's bet is that you already have a great 1x camera; what you really need is reach. 200MP on a long lens means you can crop into a 7x or 10x shot and still have a usable high-resolution image — better for surveying, estate work, long-range documentation. Main is a 50MP Sony sensor. Read our full OPPO Find X9 Pro camera review.

Winner: Tie — depends on whether you need best main (Samsung) or best zoom (OPPO).

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Performance

• Samsung Galaxy S25 Ultra: Snapdragon 8 Elite for Galaxy — Qualcomm's top chip, customised for Samsung, benchmark-leading single-core performance.
• OPPO Find X9 Pro: MediaTek Dimensity 9500 — MediaTek's flagship. Benchmarks close to Snapdragon 8 Elite, and in real business use you will not tell them apart.

OPPO has 16GB of RAM vs Samsung's 12GB — useful for heavy multitasking.

Winner: Effectively a tie in day-to-day use.

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Productivity: S Pen vs ColorOS

Samsung Galaxy S25 Ultra

• S Pen — built in. Sign documents with a proper stylus, mark up site photos, take handwritten notes that convert to text, translate on the fly.
• Samsung DeX — plug into a monitor and you have a desktop-like experience. Useful for knowledge workers on the road.
• Samsung Knox — industry-leading mobile security platform. Widely used in regulated sectors. See best Samsung phones for business.
• Galaxy AI — on-device and cloud AI features. See Samsung Galaxy AI business guide.

OPPO Find X9 Pro

• ColorOS is fluid, customisable and borrows the best of iOS and Android.
• Hotspot with this battery is genuinely a productivity feature — you can use your phone as a mobile office for a whole day.
• No native S Pen. You can pair any Bluetooth stylus but the integration is nowhere near as deep.

Winner: Galaxy S25 Ultra for knowledge workers and regulated sectors.

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Security

• Samsung Galaxy S25 Ultra: Samsung Knox is best-in-class for Android enterprise. Many MDM platforms (Intune, Workspace ONE, Jamf) have Samsung-specific features that go beyond standard Android Enterprise.
• OPPO Find X9 Pro: Android Enterprise ready, Google Play Protect, regular security patches. Fine for general business use; not as deep as Knox for highly regulated environments.

For a wider discussion of what matters see our business mobile security guide.

Winner: Galaxy S25 Ultra for regulated business. OPPO fine for general SMB.

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Software Longevity

• Samsung Galaxy S25 Ultra: 7 years of OS and security updates — the longest in the Android world, matching or beating Google Pixel and Apple.
• OPPO Find X9 Pro: Android 16 with ColorOS. Multi-year updates, but OPPO has not publicly matched Samsung's 7-year commitment at launch.

Winner: Galaxy S25 Ultra.

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Price

• OPPO Find X9 Pro 256GB: £1,099 RRP.
• Galaxy S25 Ultra 256GB: from around £1,249.

Over a 24-month business contract, £150 less on the handset works out to roughly £6/month per device. Across a fleet of 10 phones that is £720 saved over the term.

See OPPO Find X9 Pro on business contract UK for tariff guidance.

Winner: OPPO Find X9 Pro.

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Network Availability (UK)

• Samsung Galaxy S25 Ultra: stocked on EE, Vodafone, O2 and Three for business. Every major reseller.
• OPPO Find X9 Pro: strongest on Three and O2. EE and Vodafone availability is patchier.

O2 business plans include Roam at Home (25GB EU data + inclusive mins/texts) at no extra cost — Vodafone and EE do not match this. If your team travels in Europe, O2 is worth a look regardless of handset.

Winner: Galaxy S25 Ultra for pure availability.

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Verdict: Who Should Buy Which?

Buy the OPPO Find X9 Pro if:

• Battery life is critical — you are on the road, on site, or hotspotting a laptop.
• You want the biggest telephoto reach for documenting distant subjects.
• You are on Three or O2 already.
• £1,099 RRP matters on a fleet rollout.
• You do not need an S Pen.

Buy the Samsung Galaxy S25 Ultra if:

• You need the S Pen for signing, annotating or note-taking.
• You are in a regulated industry where Samsung Knox is a requirement.
• You need 7 years of guaranteed updates.
• You use Samsung DeX as a mobile desktop.
• You want the best 1x main camera on the market.

If you can wait, also look at Samsung Galaxy S26 Ultra business guide — the 2026 model is the next Samsung step forward.

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Frequently Asked Questions

How much bigger is the OPPO Find X9 Pro battery than the Galaxy S25 Ultra?

The Find X9 Pro has a 7,500 mAh silicon-carbon battery versus the Galaxy S25 Ultra's 5,000 mAh — roughly 50% more capacity. Reviewers report 10+ hours of screen-on time on the OPPO.

Does the OPPO Find X9 Pro have an S Pen like the Samsung?

No. The S Pen is a Samsung Ultra exclusive. The OPPO Find X9 Pro does not include one and does not have the dedicated silo or software integration.

Which has the better camera, the OPPO or the Samsung?

Both have 200MP sensors, but positioned differently. Samsung puts 200MP on the main camera for best 1x quality. OPPO puts 200MP on the telephoto periscope for best long-range quality. It depends on what you shoot.

Is Samsung Knox better than OPPO's security for business?

Yes for regulated sectors. Samsung Knox is the most mature mobile security platform in Android and is supported by every major MDM with Samsung-specific features. OPPO ships standard Android Enterprise, which is fine for general business but less rich.

Which is cheaper on a UK business contract?

The OPPO Find X9 Pro is cheaper — £1,099 RRP vs ~£1,249 for the Galaxy S25 Ultra. On a 24-month business contract the difference works out at roughly £6/month per handset. Get a free quote to see current pricing.

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Related reading:

• OPPO Find X9 Pro full review
• OPPO Find X9 Pro battery life explained
• OPPO Find X9 Pro camera review
• OPPO Find X9 Pro full UK specs
• OPPO Find X9 Pro vs iPhone 17 Pro Max
• OPPO Find X9 Pro on business contract UK
• Best Samsung phones for business
• Samsung Galaxy S26 Ultra business guide
• Samsung Galaxy AI business guide
• iPhone vs Samsung for business 2026

OFCOM-regulated. Independent since 2008. 4.3/5 on Trustpilot.

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