Rei on 10 April 2009
Install base doesnt matter that much. It's not like if a game has sold 10 million copies on a 100 million userbase then it'll sell only 3 millions on a 30 million userbase. It doesnt work like that. At all.
GT4 was the 2nd GT game on PS2, therefore it had lower sales. It happens like that almost all the time with big games (GTA being an exception)
