oi, what isn't missing....
It has 400 less cars than number 2. I read an interview that talked to the designer and he said that GT 1 and 2 used the same modeling techniques, and they had gotten so used to the interface that 1 car a day was possible.
GT3 was more complex and they could only do 1 car a month in some cases.
Almost all the high end cars ar in it, and quite a few new ones, like the mazda 787, and F1 cars. I just miss some of the depth the low end cars added to the game.
It has less tracks than 2 as well, for the same reason.
Don't get me wrong, the game is incredible, it's just that they should not have called it GT3, it should have been Gran Tourismo: A-spec, instead of making it the next in line.