The guy at Bama said the difference between the three was all about the octane you use and the mods installed on the vehicle. The three are just as they sound. Street, No mods but will help make your car run its best.
l was given a performance tune a few years ago for the upgrades or add ons that l installed on my car which were CAI, exhaust system, Oh my gosh, l can't think what my other two were, something else for my motor! I, have to go to AM for my list.
And Race is for cars that are used at the track using Nitrous (sp) or higher octane and for their add ons. They can explain it better than l.