The PS3 had a far more powerful CPU when used properly but the X360's GPU was generally abit more powerful & flexible. Conversely the base Xbone has a (slightly) more powerful CPU(And some more dedicated hardware units for signal processing) than the base PS4 but that ofc has a more powerful GPU. Then to be fair as things stand now the XboneX is undoubtedly more powerful in both aspects, having lived in houses with both a Pro and a OneX the latter definitely has a more premium feel(Quieter, smaller, faster, more functionality & weird cool features) but of course there's far more good single player exclusives on PS4 if that's your thing, but having some cool multiplayer exclusives and a good range of X360 games(Both a good range of exclusives and some general 7th gen gems) you can play with upgraded graphics is also quite nice, depends what you're after.