The skyline is the most neutral. It will probably be the body of choice for the Finals in GT-2. The corvette and the Calsonic 350Z bodies don't seem to have a lot of down force, because of too much body weight in the back,causes the back end to swing around too much. If you have a car that is pushy, these might work! I haven't tried the Porsche so I couldn't tell you!
Just my 2$
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