Here we go. Fan boys and flame wars FTW.
The PS3's convoluted architecture is not its only weakness. It also has a severe memory disadvantage. Additionally, the 360 has independent scaling hardware, meaning that relatively simple OS updates can handle all new screen comers natively. The PS3 places the burden of adapting game resolution to display resolution on the game code's plate, further adding to the memory woes, and causing issues for users of certain displays. That includes otherwise stellar games (e.g., Burnout: Paradise).
The PS3 has by far the bigger storage medium. However, that size comes at a price. Bluray is inherently slower than DVD to access randomly. The solution often seems to be mandated partial installation to HDD, which of course would also solve the storage-size disadvantage on the 360 side. Once disc swapping goes away, I see no reason why either console can't shine equally with any game vision from this generation of developers. That very much includes Final Fantasy XIII, which is a relatively shoddy effort on the Microsoft platform, perhaps for reasons internal to Square Enix, Sony, or both.