Good question. Body poses will work if they are just posing the figure. That only requires rotation and translate settings. Poses with morphs, shaping poses, would require a morph of identical name as would facial expressions, which are all morph-based. The tweaking needed is caused by the bodyshape, for example Mike is much "thicker" than Stephanie, hence his hip sits in a different space than Stephanies in the same pose. The skeleton is the same but the body isnt.