Yes, V4~WM uses the same topology (geometry&subdivision) as V4, but has no or minimal magnets and joint controlled morphs. To make up for those extra body parts have been added. These body parts do have a reference geometry to work around a bug in Poser but this is all added at the end of the original V4 geometry description so they do not affect the vertex count or vertex order in the body part objects. Your morphs will work as for original V4.