In old Ren at least, the Airstrip/WF should always win because of APC whoring, to a certain point where servers would actual discourage against it. Having been on the Bar/Hon side many times, it's very discouraging to just stay in the base with a Mob/Syd and try to fend off endless tank rushes. Not to mention it's stupidly hard to attack a base with just infantry, especially when there are base defenses.
In a marathon it's pretty much game over for infantry side, in AOW the infantry could still win by points if they can successfully prevent arty/mrls whoring.