The 3D visualizer uses solid black, which greatly reduces its utility. For example, if looking from the top you can't get a good sense of how open the blade is and because of that it can skew what is curve vs openness. For me, the ability to side by side compare two different curves that have a checkerboard pattern would be incredibly useful.
Gepetto should just send a few of us one of each curve to review :) Though I just ordered my fourth PRO curve trying to chase the perfect curve, so it might cut into his sales...