What does more power give you between X1 and PS4

[Machiavellian]

sniper989 said:
Mostly exclusives looking much better on PS4, but some multiplats may up the graphics (like Assassin's Creed)

I have always wondered if the exclusives look better because of the studio behind the exclusives or the hardware.  Design plays just as much a role in making a game then the pure grunt of the hardware.  One of the main reasons I purchase a Sony console is because I believe they have some of the best studios in house.  Its the main reason I will be getting a PS4 at some point once those exclusives start to hit the shelves.