Comparison
Samsung Galaxy S26 Ultra or S25 Ultra: a comparison by Samsung's figures
Two generations of Samsung's most fully equipped line, both with 256 GB. The comparison is for anyone choosing between the new model and the one-year-older model that is still sold: it shows what Samsung states for both, and today's prices from the shops we track.
Categories in this guide:SmartphonesPhones, tablets, wearables
Products in this guide:Samsung Galaxy S26 Ultra 256 GBSamsung Galaxy S25 Ultra 256 GB
Prepared by the Banbosh Studio editors with AI from the comparison's data; first published 29 October 2026. Facts checked on 29 October 2026 against the 2 sources listed at the end. Text last updated 29 October 2026.
The short answer
The 6.9-inch display at 3120 x 1440, the 5,000 mAh battery and the 200 + 50 + 50 + 10 MP camera set did not change per Samsung. The newer model has a faster processor (top clock 4.74 GHz against 4.47 GHz), wider apertures on two of the four cameras, 4 g less weight and security updates Samsung promises for a year and a month longer. Whether it pays shows in today's price of both models below.
- We compare the 256 GB variant; other capacities have other prices.
- The figures are from Samsung's pages for Czechia, not our measurements.
Who fits which model
- Situation: The lower price decides
- Model: Galaxy S25 Ultra (from CZK 27,990)Why: The older generation with a similar display, battery and camera resolution; today's price gap is on the product card
- Situation: You want the longest support
- Model: Galaxy S26 Ultra (from CZK 25,888)Why: Samsung states security updates until 28 Feb 2033, for the S25 Ultra until 31 Jan 2032
- Situation: You shoot in low light
- Model: Galaxy S26 Ultra (from CZK 25,888)Why: Samsung states wider apertures on the main and one other camera (ƒ/1.4 against ƒ/1.7 and ƒ/2.9 against ƒ/3.4)
- Situation: The generation does not matter
- Model: Either modelWhy: Per Samsung the display size, resolution, battery capacity and megapixel counts are the same
Decision flow: which generation
Do you want security updates for as long as possible?
Yes → Per Samsung they last longer on the Galaxy S26 Ultra (until 28 Feb 2033).
Do you need better photos in low light?
Yes → Samsung states wider apertures on the Galaxy S26 Ultra.
Does the price at the same capacity decide?
Yes → Compare today's prices on the product cards and take the lower of the models that suffice.
No → Choose by availability and the shop's rating.
What Samsung states for both models
The figures come from Samsung's pages for Czechia read on 29 Oct 2026. The order of the apertures follows the order of lenses in which Samsung lists them (200 + 50 + 50 + 10 MP); we do not say which lens is which.
- Display: Dynamic AMOLED 2X at 3120 x 1440 (Quad HD+) on both; the full-rectangle diagonal is 174.2 mm on the S25 Ultra and 174.9 mm on the S26 Ultra.
- Processor: top core clock 4.47 GHz on the S25 Ultra and 4.74 GHz on the S26 Ultra.
- Cameras: 200 + 50 + 50 + 10 MP on both; apertures ƒ/1.7, ƒ/3.4, ƒ/1.9, ƒ/2.4 on the S25 Ultra and ƒ/1.4, ƒ/2.9, ƒ/1.9, ƒ/2.4 on the S26 Ultra. A 12 MP front camera at ƒ/2.2 on both.
- Battery: 5,000 mAh (typical) on both.
- Size and weight: 162.8 x 77.6 x 8.2 mm and 218 g on the S25 Ultra, 163.6 x 78.1 x 7.9 mm and 214 g on the S26 Ultra.
- Security updates: per Samsung until 31 January 2032 on the S25 Ultra and until 28 February 2033 on the S26 Ultra.
- Wi-Fi: for the S26 Ultra Samsung lists standards up to 802.11be (Wi-Fi 7); we did not find the standard for the S25 Ultra on the page, so we do not compare it.
The comparison in a table
What the 256 GB variant costs today
We read prices from the offers of the shops we track; each offer carries the day it was captured and shipping separately. A number in the text would go stale, so the product cards show it.
Samsung Galaxy S26 Ultra 256 GB (from CZK 25,888)
Samsung Galaxy S25 Ultra 256 GB (from CZK 27,990)
Which price band the phones fall in
The chart sorts all tracked phones by today's goods price into bands computed from the data; it shows how wide the range around both models is.
- under CZK 5,000114 products
- CZK 5,000 – CZK 15,000118 products
- CZK 15,000 – CZK 30,00092 products
- over CZK 30,00076 products
What do the products in this guide cost today?
- Samsung Galaxy S26 Ultra 256 GBCZK 25,888
- Samsung Galaxy S25 Ultra 256 GBCZK 27,990
Who it is for
- You choose between the Galaxy S26 Ultra and last year's S25 Ultra at a lower price.
- You want to know whether the processor and camera changes match the price gap.
- You buy for several years and care about the security update period.
Watch out for
- Different capacities and colours have different prices; compare the same capacity.
- An offer from an unverified shop or with unknown shipping should not be the first choice, even if it is the cheapest.
- Fewer shops carry the older model today; check which offers are in stock and when we captured them.
Frequently asked questions
- Is the Galaxy S26 Ultra dearer than the S25 Ultra?
- Today's prices of the 256 GB variants of both models are on the product cards above the table, with the day captured and shipping separately. The gap moves with the shops' promotions.
- How does the S26 Ultra differ from the S25 Ultra per Samsung?
- A higher top processor clock (4.74 GHz against 4.47 GHz), wider apertures on two cameras, lower weight (214 g against 218 g) and a longer security update period (until 28 Feb 2033 against 31 Jan 2032).
- Does the newer model have a bigger battery?
- No. Samsung states a typical 5,000 mAh for both.
- Where do the figures come from?
- From Samsung's pages for Czechia read on 29 Oct 2026. They are the maker's figures, not our measurements.