I've played the alpha in a tank, and War Thunder in a tank. The only edge War Thunder has right now, imho, is graphics. If AH3 finalizes into a War Thunder-like graphics package (ie, the explosions, terrain, clutter, etc), and all evidence seems to be pointing in that direction, you're going to need an army or divorce papers to get me off the computer I'm building.
(Also, there was a thread yesterday about making the ord bunker explosion more realistic, with an actual 50k pounds or so of ords going off at once. That would be way cool, too.)