10 cars, 8 japanese, 2 euro.
the physics differences between GT4 and GTHD are very minimal. The Integra still can't find traction in a straight line in first gear, no matter how hard you try, and if you watch replays, the "drifting" angles are very low.
the only real differences I've found so far, are RWD cars spinning the tires easier at higher speeds, and they also break them loose more easily while turning.
nevertheless, real-world drift angles are next to impossible to control, and end quickly whether you wreck or pull it back, same as with GT4. Hell, most of the cars sound exactly the same as they did in GT4