ok....all i have to say is, firebirds look cheap, imo, if your going to get a pontiac get a trans am, they look much better.

 

Well IMO the best looking pontiac LS1 is the Formula with WS6 package. Weighs a little less then the TA too which is nice for racing at the track. But the original poster was asking about V6 firebird or V6 camaro so the trans am/formula debate is off topic.

But they all look nice and no F-body looks cheap IMO so just pick the one you think looks the best.

 

Like everyone else said, Just appearance.

I think the Camaro weighs slightly less cause of no body kit and not as much interior stuff usually.