Head to head
Samsung Galaxy S25vsSamsung Galaxy S23
The short answer
Choose the Galaxy S25 for peak brightness, video playback time and Geekbench 6 CPU score. The Galaxy S23 wins no row by a gap you’d notice. The Galaxy S25 is £50 cheaper at UK RRP (£799 against £849). The Galaxy S25 gets security updates for longer: until January 2032, against February 2028 for the Galaxy S23.
- Released
- 2025-02-03endoflife.date, retrieved 2026-08-20
- Price
- £799Samsung Newsroom UK — Galaxy S25 series, retrieved 2026-08-20
- Security updates until
- 2032-01-31Samsung UK spec API — Galaxy S25, retrieved 2026-09-22
- Released
- 2023-02-17endoflife.date, retrieved 2026-08-20
- Price
- £849Samsung Newsroom UK — Galaxy S23 series, retrieved 2026-08-20
- Security updates until
- 2028-02-17endoflife.date — Samsung mobile, retrieved 2026-09-06
3 wins for Galaxy S250 wins for Galaxy S231 gap borderline3 differences you won’t notice£50 apart at RRP
Verdict: Galaxy S25 ahead on 3 rows, Galaxy S23 on none
On the makers’ figures and the named third-party sources, the Galaxy S25 wins on peak brightness (2,600 nits from GSMArena against 1,750 nits from the maker), claimed video playback (29 h against 22 h) and Geekbench 6 (CPU, multi-core) (8,599 against 4,547, both from Geekbench Browser). One gap is borderline, a difference most people would not notice: RAM (12 GB against 8 GB) for the Galaxy S25. The differences in weight, display size and battery capacity are below the thresholds you would notice. Both state the same refresh rate, storage (base), fast charging and wireless charging. The other 36 rows have no threshold or no direction to judge by, so nobody wins them.
True to scale
Outlines from each maker’s published dimensions, drawn to scale. Corner rounding is our drawing convention, not a measurement.
Specifications
A win is marked only where the figures can be ranked and the gap is one you could notice. A row the site has no threshold for says whether the two differ, and that it is not ranking them. = marks the same figure on both, ≠ not ranked a difference with no ranking. Every figure carries its source.
Body
Display
Platform
Memory
Camera
Battery
Connectivity
Benchmarks
4 attributes neither phone has a sourced figure for
Typical brightness · HDR peak brightness · OS versions supported · Google Mobile Services. Rows appear as sources are cited — a gap in our data, not a statement about either phone.
Questions
Is the Galaxy S25 better than the Galaxy S23?
On the figures, the Galaxy S25 is ahead wherever there is a gap you’d notice: peak brightness, 2,600 nits (GSMArena) against 1,750 nits (Samsung Newsroom UK), claimed video playback, 29 h against 22 h (both Samsung UK) and Geekbench 6 (CPU, multi-core), 8,599 against 4,547 (both Geekbench Browser). The Galaxy S23 wins no row by such a gap. That is a count of rows, not an overall score.
Which has the better battery?
The Galaxy S25, by a gap you’d notice: claimed video playback, 29 h against 22 h (both Samsung UK). The Galaxy S25 is ahead on paper, but not by a gap you’d notice: battery capacity, 4,000 mAh against 3,900 mAh (both Samsung Newsroom UK).
Which is lighter?
The Galaxy S25 is lighter on paper, but not by a gap you’d notice: weight, 162 g against 168 g (both Samsung Newsroom UK).
Which has the brighter screen?
The Galaxy S25, by a gap you’d notice: peak brightness, 2,600 nits (GSMArena) against 1,750 nits (Samsung Newsroom UK).
Which gets updates for longer?
The Galaxy S25 gets security updates for longer: until January 2032, against February 2028 for the Galaxy S23. Sources: dates from Samsung UK spec API and endoflife.date.
Which is cheaper?
The Galaxy S25 is £50 cheaper at UK RRP (£799 against £849). Prices from Galaxy S25: Samsung Newsroom UK; Galaxy S23: Samsung Newsroom UK.
Other comparisons
The pairs a buyer of either phone would also weigh. Any two phones in the catalogue can be compared from the chooser.