Aeroworks 40% edge
Aerotech may make good planes, but I will never know. They want 2/3 of the money up front as a deposit and then you have to wait for the kit.
Carden only takes a 50.00 deposit. I've owned 4 cardens and see no need to look for something that is supposedly better. Carden makes the best kit I have seen, and the planes will last for years even under abusive situations.
Todd