You can race in about 25 diffrent competitions. From the F1 2011 season till the F1 '86 season cars. And some diffrent touringcars also, srry for the americans but there is no nascar. But they have the 2008 indycar series
All cars needs a unique setup and racingtactic to win. Wich make it more challenging then other racegame's.
Also you start down the ladder. First you need to pass an academic season, wich you need to perform pretty well, till you get the chance to ride against the best players in the world.
I would say, try it and see if you like it or not: http://batracer.com/-1FrontPage.htm?ew5