Ps 5 is much bigger but have ghost of Tsushima and last of us ! Xbox have game pass (imagine getting starfield , Diablo 4[if acquisition pass] , new or any Bethesda/acti game for small monthly fee instead of £65 each) but ps5 can switch off crossplay and find lobbies. Tough decision. If you don’t mind multiplayer games , I would pick up series x as it probably will age better due to more powerful hardware and game pass will keep you occupied even if you don’t have idea what you would like to play.