I don't know of any doc like that, but it is usually the case that the mappings are all the same but things are missing on certain aircraft (i.e. oil radiator etc). It's not so much as case of having a different button to press each plane, just that it's not there in the first place!
The wheel brakes are different between planes, but that is mainly just between how they modelled the Allied aircraft using a switch on the stick vs having to press toe brakes (like the Axis aircraft).
It would be a handy doc to have I guess.