You get a lot less options. It's a pain in the ass flashing to other roms because I believe recovery is messed up or something (I've never tried out the froyo leak but I heard so many problems with it). Devs continue working on their ROMs whereas froyo leak, it's just a leak and it's done.
Read up on stuff please and try stuff out for yourself. Know what you're flashing before you flash so that you don't have to come on XDA in desperation saying your recovery is busted or your phone is bricked. Reading helps a lot, I can tell from experience.
TELUS Galaxy Note 2 SGH-i317M
Past phones: Bell Galaxy S II, AT&T Captivate, HTC Magic 32B