Samsung Galaxy S26 Ultra vs S25 Ultra Refurbished UK (2026): Should You Save on S25 Ultra?

The Samsung Galaxy S26 Ultra is Samsung's newest premium Ultra smartphone, but the arrival of a new generation does not automatically make the Galaxy S25 Ultra a poor buy.

In fact, the two phones share far more than you might expect.

Both have a 6.9-inch QHD+ Dynamic AMOLED 2X display, adaptive refresh rate up to 120Hz, 2,600-nit peak brightness, an integrated S Pen, 5,000mAh typical battery, up to 31 hours of video playback and a four-camera system led by a 200MP Main camera.

Galaxy S26 Ultra improves the formula with a built-in Privacy Display, Snapdragon 8 Elite Gen 5 for Galaxy, wider camera apertures for low-light photography, faster 60W charging and a slightly thinner and lighter body.

But if a refurbished Galaxy S25 Ultra costs substantially less, the older flagship can still offer exceptional value.

Galaxy S26 Ultra vs S25 Ultra: Specs at a Glance

1. The Biggest Surprise: Much of the S25 Ultra Is Still the Same

Looking only at model numbers can make the jump from S25 Ultra to S26 Ultra seem much bigger than it really is.

Samsung kept several of the most important specifications unchanged.

That is why S25 Ultra remains such a strong refurbished proposition in 2026.

2. Privacy Display Is the Most Unique S26 Ultra Upgrade

The feature that most clearly separates S26 Ultra from S25 Ultra is Samsung's new Privacy Display.

Instead of requiring a separate privacy screen protector, the technology is built into the display itself.

When enabled, it can reduce the visibility of content when somebody looks at the screen from an angle.

Samsung also lets you customise Privacy Display so it can protect:

For commuters, business users and people regularly handling sensitive information in public, this could be a genuine reason to choose S26 Ultra.

If you rarely need screen privacy, it is much less important.

3. Display: Don't Upgrade for Brightness Alone

Both phones use a 6.9-inch QHD+ Dynamic AMOLED 2X display with adaptive refresh up to 120Hz.

Samsung lists both generations at up to 2,600 nits peak brightness.

S26 Ultra brings processing and privacy improvements, but the basic display size, resolution, refresh rate and headline brightness remain extremely similar.

4. Design: S26 Ultra Is Thinner and Lighter

Samsung has refined the physical design for 2026.

The difference is only four grams and 0.3mm, so it is a refinement rather than a dramatic transformation.

Interestingly, buyers who specifically prefer a titanium frame may actually favour the older Galaxy S25 Ultra.

5. Performance: Snapdragon 8 Elite Gen 5 Is Faster

Galaxy S26 Ultra uses the newer Snapdragon 8 Elite Gen 5 for Galaxy.

Galaxy S25 Ultra uses Snapdragon 8 Elite for Galaxy.

Samsung claims the newer generation provides:

Those are Samsung manufacturer comparisons rather than a promise that every app will become 19–39% faster.

For ordinary browsing, social media, streaming, navigation, photography and messaging, S25 Ultra remains extremely powerful.

6. Which Is Better for Gaming?

Serious mobile gamers have more reason to consider S26 Ultra.

Its newer Snapdragon processor brings increased graphics performance and additional processing headroom for demanding titles.

But both phones have:

Casual gamers should not pay a large upgrade premium based on processor generation alone.

7. Cameras: Same Resolutions, Better Lenses on S26 Ultra

This is one of the most important parts of the comparison.

At first glance, the camera specifications look almost unchanged.

But Samsung has changed the apertures of two important cameras.

The wider apertures allow the newer cameras to gather more light, which is particularly useful in darker environments.

8. Is S26 Ultra Much Better at Night?

Low-light photography is one of Samsung's biggest S26 Ultra marketing points.

Samsung says the new f/1.4 Main lens is considerably brighter than the previous generation, while the wider 5x telephoto aperture also helps gather additional light.

That can help with:

For daytime photos, the difference may be less important because the two phones already share very similar sensor resolutions and zoom ranges.

9. Zoom: Surprisingly Similar

Do not upgrade from S25 Ultra expecting a completely new zoom range.

Both provide:

S26 Ultra's advantage is better light gathering on its 5x camera rather than simply offering a much longer zoom number.

10. Battery: It's Essentially a Draw

Samsung kept the typical battery capacity at 5,000mAh.

That means there is no headline battery-capacity or Samsung video-playback advantage for the newer generation.

Real-world battery behaviour can still differ because of processor efficiency, software, signal strength, brightness and individual battery condition.

11. Refurbished Battery Condition Matters

When comparing a new S26 Ultra with a refurbished S25 Ultra, remember that battery age is a separate consideration from model specification.

Rechargeable batteries naturally lose capacity through age and charging cycles.

That does not make refurbished S25 Ultra a poor purchase, but it does mean you should buy from a retailer that checks the device rather than simply comparing the original 5,000mAh specification.

12. Charging: S26 Ultra Gets a Useful Upgrade

Charging is one area where Samsung made a measurable improvement.

If you frequently top up your phone during short breaks, S26 Ultra's charging improvement can be useful.

Compatible charger sold separately. Charging speed varies with equipment, temperature, battery level and device use.

13. S Pen: You Don't Need S26 Ultra for It

Both phones include Samsung's integrated S Pen.

That means S25 Ultra remains excellent for:

If S Pen is your main reason for buying an Ultra, the S25 Ultra already delivers the core experience.

14. Galaxy AI: Both Are AI Phones

Do not assume S25 Ultra suddenly loses Galaxy AI because S26 Ultra exists.

S25 Ultra was itself launched as a major Galaxy AI device and continues to support a wide selection of Samsung AI features.

S26 Ultra pushes the platform further with newer hardware and features such as Now Nudge, which can recognise information on screen and suggest relevant next actions.

Specific AI features can vary by software version, language, region, Samsung Account requirements and network connectivity.

15. Software Support: Both Have Long Runways

Samsung committed the Galaxy S25 series to seven generations of operating-system upgrades and seven years of security updates from launch.

Samsung has made the same seven-generation OS commitment for the S26 series.

S26 Ultra naturally begins that support period one year later, giving it a longer remaining runway.

But S25 Ultra still has an unusually long software-support period remaining for a refurbished Android flagship.

16. Storage: No Major Difference

Both generations are available with:

For most buyers, 256GB provides plenty of room for apps and ordinary photography.

512GB becomes particularly attractive if you record lots of high-resolution video, install large games or intend to keep the phone for several years.

A refurbished S25 Ultra with 512GB can sometimes be better practical value than spending more on a newer 256GB S26 Ultra.

17. Original UK Pricing

The original launch prices were only £30 apart at entry level.

But that is no longer the useful comparison.

A refurbished S25 Ultra has already experienced a significant part of its depreciation.

18. How Much More Is S26 Ultra Worth?

There is no fixed answer because refurbished prices change.

Do not pay a large premium simply because 26 is a higher number than 25.

19. Which Is Better for Photography?

Choose S26 Ultra if low-light photography is a priority.

Its wider Main and 5x telephoto apertures are meaningful hardware changes.

For daylight photographs, Ultra Wide shots and ordinary zoom use, the S25 Ultra remains extremely competitive because the headline sensor resolutions and zoom ranges are largely unchanged.

20. Which Is Better for Everyday Use?

This is where S25 Ultra makes its strongest value argument.

Both provide:

For WhatsApp, browsing, email, photography, YouTube, social media, navigation and everyday apps, the difference can feel much smaller than the price difference.

21. Cosmetic Grade Can Change the Value Equation

The processor, storage, camera hardware and display specification of the same model do not change because its cosmetic grade changes.

That means a Good or Very Good S25 Ultra may be an excellent way to maximise flagship hardware per pound.

22. Should S25 Ultra Owners Upgrade?

For most existing Galaxy S25 Ultra owners, we would not consider S26 Ultra an automatic upgrade.

You are keeping the same:

Upgrade mainly if Privacy Display, improved low-light camera performance, newer processing or faster charging genuinely matters to you.

23. Who Should Buy Galaxy S26 Ultra?

24. Who Should Buy Refurbished Galaxy S25 Ultra?

Galaxy S26 Ultra vs S25 Ultra: Final Verdict

Frequently Asked Questions

Is Galaxy S26 Ultra better than S25 Ultra?

Yes overall. S26 Ultra has a newer Snapdragon processor, Privacy Display, improved low-light camera apertures, faster charging and a lighter, thinner body.

Is Galaxy S25 Ultra still worth buying in 2026?

Yes. It still provides a 6.9-inch 120Hz AMOLED display, integrated S Pen, 200MP Main camera, two telephoto cameras, Galaxy AI, 5,000mAh battery and long software support.

Does S26 Ultra have a bigger screen?

No. Both Galaxy S26 Ultra and S25 Ultra have 6.9-inch QHD+ Dynamic AMOLED 2X displays.

Is the S26 Ultra screen brighter?

Not by Samsung's headline peak-brightness specification. Both are listed at up to 2,600 nits.

What is Privacy Display?

Privacy Display is built into Galaxy S26 Ultra's screen and can reduce side-angle visibility to help keep selected apps, notifications, passwords or the full display more private in public.

Does Galaxy S25 Ultra have Privacy Display?

No. Samsung introduced the built-in Privacy Display with Galaxy S26 Ultra.

Which has the better camera?

Galaxy S26 Ultra has the stronger low-light hardware because its Main and 5x telephoto lenses use wider apertures. The overall sensor resolutions and zoom range remain very similar.

Does S26 Ultra have better zoom?

Not in headline range. Both provide 3x and 5x optical zoom, 10x optical-quality zoom and digital zoom up to 100x.

Does S26 Ultra have better battery life?

Samsung lists both phones with a 5,000mAh typical battery and up to 31 hours of video playback, so there is no headline battery-runtime advantage.

Does S26 Ultra charge faster?

Yes. Samsung rates S26 Ultra for up to 75% charge in around 30 minutes with a suitable 60W adapter, compared with up to 65% in around 30 minutes using 45W on S25 Ultra.

Do both have S Pen?

Yes. Both Galaxy S26 Ultra and Galaxy S25 Ultra include an integrated S Pen.

Is Galaxy S25 Ultra titanium?

Yes. Galaxy S25 Ultra uses a titanium frame. Galaxy S26 Ultra uses Samsung's Armor Aluminum frame.

Which phone is lighter?

Galaxy S26 Ultra is slightly lighter at 214g compared with 218g for S25 Ultra.

How much did Galaxy S26 Ultra cost at launch?

Samsung launched Galaxy S26 Ultra in the UK from £1,279.

How much did Galaxy S25 Ultra cost at launch?

Galaxy S25 Ultra launched in the UK from £1,249 for 256GB.

Should I buy S26 Ultra or save money on S25 Ultra?

If the price gap is small, choose S26 Ultra. If a comparable refurbished S25 Ultra is substantially cheaper, S25 Ultra is likely to offer better value for most everyday users.

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Specifications, manufacturer performance claims and UK launch pricing are based on Samsung information available on 10 September 2026. Battery, charging, camera and performance results vary according to settings, environment, network, battery condition and usage. Refurbished stock, prices, colours and cosmetic grades change regularly.