I think Cap wins pretty easily especially with his shield.
Armored Bat was slow as hell.
Cap is already seen having a good fight against Tony in the CW trailers, and Tony's suit is far superior to Batman's in every single category.
His punches and kicks also were hurting Loki somewhat. Same Loki that's durable enough to be slammed around by Hulk.
It's not about fighting on par, its about bringing him down to level.
Spoiler:
There is lots, and LOTS of kryptonite involved, and even with that, Superman does pretty well, even though he was there to get Bruce's help, not fight. Even after being weakened, Batman doesn't seem to be able to draw blood from Superman from merely his punches, so the suit itself isn't that strong.
Originally posted by steverules_2
In the JLA vs Avengers story Batman said that in a fight cap would win so...
actually he said that its conceivable that cap could win...but it would take a very long time.
The man that can see the outcome of a fight based on a couple parries and blocks is the better fighter hands down...the only thing that saves comic cap and makes it any sort of fight is his (slightly) superior strength and other physical attributes