SSBM here is going to win.
I disagree with anyone who says it didn't bring much more to the table. Aside from a wole new host of characters, which added strategy into itself (playing the original with only 12 characters is boring as crap now), and of course the updated graphics etc, it added a trophy system and an adventure mode.
Of course these were all addons, as the true component was the multiplayer, and you will never beat the frantic four player fun that was that game.
I dont know but I never really caught on to Mike Tysons Punch Out. Ok I beat Glass Joe, the Tiger Guy, The Hippo Guy, but it just got boring and repetitive. Maybe its because I was desensitized by later games, but I didnt enjoy it, and the increased difficulty only made it worse. Maybe that why I love wrestling games so much more.