Detailed stats for vehicles, MAX's, and their weapons?

Solution 1:

This is not a complete answer; however, I have managed to dig up solid information about the tanks here. I still have very little information regarding MAX's, beyond this chart which details their anti-infantry weapons.

To expand on this answer I've found relevant information about tanks. Tanks actually take (default) 50% damage on top and sides, 45% on the front (38% for Vanguards), and 120% to the rear. The armor plating defensive items add onto this, so for example the 5% damage resistance on frontal plating reduces damage to 40% (roughly twice as good as it says on the box). In all cases this results in an increase to the hits-to-kill of one (or two for prowlers, more for Lightning 75mm gun)