it really depends on what you're looking for and how you ride, do you stick to rails or go big on jumps?volkl wall is a full camber ski that is pretty stiff which will hold up better on bigger jumps but itll tear up rails too, alpha 1s are rockered and more flexible which makes them playful but a little more shaky on big jumps
Personally, the volkls are sick and i'd pick them, but their both great skis