For me SFMM wins, simply as they have more coasters that are better.
SFGAdv has El Toro, Nitro, Bizarro, Kingda Ka (not actually that good but worth noting), Batman and that's about it as far as I'm concerned). SFMM has X2, Tatsu, Apocalypse, Riddlers Revenge, Goliath, Batman, not to mention Scream, Revolution, Viper and Superman.
Both of their park layouts are nothing special, and neither have any good flats (except the retro-fit drop towers which are essentially the same thing) and so it really just comes down to coasters and to me there's no competition.