HTC dudes please tell me if I'm right on this.
I realy have no clue, BUT!

here's my take on why AH looks similar to WB. It's all in the texture. When WB first went 3d it was the only terrain that gave me the feeling of going fast on the deck.
I think I know why. It had dots in the terrain, little small ones that look like bushes to me. But these dots going by real fast is what I think gave the feeling of fast movement. Aces High has the same "dots" on the terrain. Hense then similar look.
Am I even remotely close here? HT? Pyro?
udie