In 1/10 Touring, the body will have an affect on handeling characteristics as well, since the bodies are actually based after real cars (except for the nemesis body). Some bodies will have more aggressive steering, some are made for short tracks, some for long ... the aerodynamics of a body will dictate what is used for certain kinds of tracks. Then again, there is always the "cool factor" which doesn't mean a thing aerodynamically, just for show at the park.