Do we ever find out what brand Faith smokes ?
No.The only other brand of cigarettes besides "Huff & Puff" was the one that Nerissa smokes, but that's a reference to one of the writers of TWAU, Pierre Shorette.
Well, fuck then. If we'd know what brand she smokes, maybe we could find out which is Nerissa and which is Faith.
Maybe, but the person who criticizes Huff n' Puff is the same who later appreciates them. Maybe she just prefers Shorettes, but didn't have any on her at the end, and merely accepted and appreciated an inferior cigarette.