Don't beleive the hype guys.

No fuel injection system will change the airflow capabilities of your motor - which defines the power capability. There are proven methods of properly adjusting the fueling for CIS and CIS-E systems to optimize the AFR. The rules allow you to run timing that suits your needs. There is no reason that you cannot reach the same power level with CIS as with a standalone system, within the restrictions of the IT rules.

A1 cars are at an advantage on smaller tracks, such as Blackhawk IMO. They are at a disadvantage at longer tracks such as Road America. The A3 has the advantage on the long tracks, and the A2 is in between in both cases. NONE of these differences are strong enough to decide results unless every aspect of car prep, setup and driver ability are equal. Any one of these cars can win at a given event when prepped, setup and driven well.