The locomotion systems are very different imo. Climbey has you move your arms like you're walking in place, AoF has you move a single arm like using a ski pole.
This.
As I said last page, I think Climbey's system is better and would be near-perfect if we could detach head-direction from our swinging hands - so we could walk left while looking right, etc. As it is right now, sometimes I want to be walking forward while looking right at the rest of the level, and the game won't let me. I look right while swinging my hands and start turning right.