Brawl is slower, for sure. I still think I'd call it my fav though due to the huge number of characters in it.
Our family got it for Christmas, and we put 120 hours into it in the first nine days.
Anyway, my favorite characters would have to be Fox (who has and always will be my all time favorite. I mean, it's Starfox), Zelda (probably my best in Brawl... the alternate forms totally throw off others), and... Bowser. He's probably my worst outta those three, but I still love his power and can usually pull out a win.
<3 these games.