Alsanico-
Any of the currently available 1/12th cars are capable of good performance, although most cars are now designed for use on carpet.
I had a chance to see both of the cars you are considering run at the recent ROAR on road nats in Portland. One of the best looking cars on the track was the 12L4 of Mike Blackstock. It appeared very smooth on the bumpy track (smoother than most). According to him, the car was stock with no special chassis. I know that Kevin Jelich, who ran competetively with a Corally, did some mocifications to his car to get it soft enough.
Both are good cars, AE has good parts support here in the US. You should consider what the support is like where you are when making your decision.
O'D