Quote - What's the deal with the WW-compatible version working better with the Walk Designer? 

It doesn't work better. Odf thought it looked better because the upper body looked more animated.  It looked that way because the hip was stretching up and down because the walk designer keyframes were translating the hip up and down. Because Antonia's hip is not the hip walk designer expects, the mesh was deforming.

I have to agree it did look more interesting, but definitely not correct.