Sometimes if you are lucky, the wind is in the right direction, the moon is full and you hold your mouth just right Wardrobe Wizard will take your raw, never been made into conforming clothing OBJ and turn it into a correctly grouped conforming figure.

OBJ2CR2 however will take your grouped or un-grouped or wrongly grouped or badly grouped clothing OBJ and ALWAYS turn it into a correctly grouped conforming clothing figure. Plus it can do it with just a couple of button clicks whilst you are drinking coffee.

Wardrobe Wizard does have some regrouping routines built into it. For example if your original clothing has buttocks and thighs but you are converting to a figure with just thighs it regroups accordingly. Give it a model with just a bunch of oddly named groups in it and it will probably just go off in a huff.

Hope that helps to clarify.