If you are talking about the amount of plane call in's then Axis has an advantage simply because they are more common, but the CAS ability (not the doctrine) targets tanks first and infantry second, but it's first an AT strafe with a smaller AoE for killing infantry.
The IL-2 strafe in advanced warfare is good, the equivalent of the Ost single pin strafe.
The IL-2 anti tank run is extremely powerful, capable to killing tanks and wiping out entire armies of infantry.
The Il-2 bombing run does insanely huge damage and comes in fast, basically means if your tank is disabled and a player has this ability said tank is dead. Also excellent for killing trucks
The IL-2 anti infantry loiter does a lot of damage to infantry while also suppressing them, something the Ost equivalent can't do.
TLDR: Ost just has ability's the other factions don't, P-47's have the benefit of following tanks while the CAS ability does not.
Put down the crack pipe already.
Its IL-2 strafe vs JU-87 AT strafe, nothing more so how in the world are you coming up with all other abilities?
As I've said, whoever your dealer is, his stuff melts your brain and its getting worse post by post.