There is a little bit of discrepancy between the cars lap times... what might be interesting is to have to drive each car twice in a season, where you can choose what circuits you want to drive each car (maybe removing the Jag). That would mix the field up a bit, and add a little strategy as to what circuit to drive what car at, and what to drive compared to what others are driving. Because everyone drives all the cars, it smooths out any differences in the cars across the season. All the cars are different, but feel good to drive.