The cars and the class of drivers in F1 are supperior to Indy..
Also you mustn't forget that The good "Indy" Drivers are in Cart the chumps are in the IRL. Which imo is a joke look at cart history and look at the chumps that win in IRL these were last place guys in Cart.. Also look At the INDY Race... Last year 5 out of 6 Cart racers that entered finished in the top 6 only one IRL racer.. The other cart guy had mecahnical failure.
But you only have to look at how well cart guys that try to go f1 do there are only a handful that make it there and actually perform. X