Stoutland is probably the best of all the first Normal-types you encounter in any Pokemon game. Liepard is somewhat lack-luster when it comes to stats and moves. Stoutland, on the other hand, has a pretty nice 100 base Attack, and he gets the elemental fang moves. He also gets pretty good defensive stats, with 90 each. Liepard seems to be the counterpart to Mightyena. Looks nice, but looks can't kill, unfortunately. Liepard has impressive speed, but all it would take is a Mach Punch and it's down and out with its 50 base defensive stats and 64 base HP.
Stoutland all the way.