The Galaxy S25 FE costs £480.00 new compared with £114.95 refurbished (no longer sold new) for the Galaxy S21 FE. Buying the Galaxy S25 FE refurbished instead of new saves £181.00. If you want Galaxy AI support and a larger 6.7" screen, the Galaxy S25 FE is the better choice. If value is your priority, the Galaxy S21 FE offers the stronger buy at a lower price point.