Personally I would have thrown Garou in the mix cause to me FFS, RBS/RB2, Garou kinda mirrors ST, Marvel, 3rd Strike. Fatal Fury Special is the pure "old school" feel. Both Real Bouts have over exaggerated specials (though Real Bout Special has it more), and Garou was made to compete with Street Fighter III. It really comes down to what you like just like it does for the Capcom games.
Marvel players tend to bash on 3rd Strike and vice versa and ST players still think their game is the best of all time. You really don't hear SNK fans do that, but I always imagined it should be the same feeling when it comes down to it. (P.S. I picked FFS just because I like the old school feeling when it comes down to it.)