Actually, there are some fairly significant differences between the vision 56 and the biscuit 55- for one, the vision has those aggressive surfboard-inspired rails wheras the biscuit has more of a step rail with a relief edge. Both carve well, but the biscuit is a bit more forgiving when the edge is caught. Also, the vision is more of a big wave boat and as someone mentioned earlier, the biscuit excels in holes and has a ton of pop- having said that,it also does great on waves. The biscuit seems faster as well, partly due to the flattened stern rocker. The overall comfort is significant as well. My only beef with the biscuit, (I own both), is the depth of the cockpit near my hips-(I have a short torso). I installed the LL seat lift kit under the BA outfitting and mostly resolved this issue, and it gives me more leverage.
Either boat would serve you well