As far as I know, they're completely separate admissions processes, since the School of the Arts runs the MFA while the Graduate School of Arts and Sciences oversees the programs in English—so my former professor wouldn't know anything that'd be useful to you, I'm afraid. Sorry. (I'd also be loath to ask him for any more details outright; I've only posted things that he's mentioned to me offhand. And by "things," I mean a single piece of information. I'm no great fount of insight. Best of luck, though.)