No idea what you mean. It's just as fast, if not faster, for me. I don't know what that one does (haven't looked at the code), but it's cloth interaction is more powerful so it's probably just an interaction difference. I liked a softer interaction, but moving the mouse fast if you want to blow it up.

EDIT: I shouldn't have said "no idea". There is one reason I can think of -- this uses WebGL, so if you have a bad card or drivers this might be slower. My algorithms might be more precise too, I don't know the other code.

EDIT2: A coworker just mentioned that I should turn off antialiasing (it's on by default) and that should help a lot of machines. Also optimized WebGL a few other ways.