Would you rather improve your Gamerscore, or make the PS3 take even longer to load your useless Trophies and perform that weird "syncing" process that seems to exist for no justifiable reason? Achievements instantly add value to any game, while Trophies actively take value away because they're stupid and lame and nothing like Achievements except the bits that are a blatant rip-off.
If you're not playing games to add to an arbitrary number that appears next to a name you made up for yourself, then you're doing it wrong. No forced installs on the 360 version: Final Fantasy XIII will blatantly have a forced install on the PS3, making gamers wait for ten thousand years while most of the game is uploaded or downloaded or whatever it does to the PS3's hard drive.
If you want to have your lungs turn to liquid and dribble out of your arse, by all means, go for it.
Just try not to make a mess on the carpet when your brain bleeds from your eyes and your tongue turns black. Achievements Trophies: The superiority of Achievements over Trophies has become so acknowledged that scientists have actually accepted it as one of the laws of physics.
The 360 is the lead platform for everything, even Wii exclusives, which is why the PS3 version of Bayonetta is a pale and pathetic shadow of the much better 360 one.
The PS3 is like Jett Travolta -- beautiful but slow.
The 360, on the other hand, is fast, like a panther leaping on a bottle of light.
Even if the 360 version of XIII had a forced install, it would be completed so fast that time itself would rupture and you would end up leaping into the bodies of people from the past, altering the course of history and looking into a mirror every episode before saying, "Oh boy." The 360 version never forces installs on you, however. Online multiplayer would be better on the Xbox 360 if Final Fantasy XIII had online multiplayer: Final Fantasy XIII doesn't have multiplayer, but if it DID, then the Xbox 360 version would be the clear winner.
In fact, Microsoft has never been known to impose anything, ever, on its customers, and has always been about freedom, choice and putting the consumer first. Xbox Live is simply superior to the Play Station Network -- or should I gay GAYGAYSTION WETWORK!?