well, i simply chaned M3's body scale to be larger and V4's body scale to be smaller. also, i scaled both their heads a bit larger.
these scaling are distributed here as pz2 file. you double click on the file - and the figure will be be given the new scale. those pz2 files work on conformed clothing as well - you load the clothing item, conform it to the figure, and then apply the scaling file on the clothing item, and it will re-fit itself to the scaled figure.

i hope that answers your question. :)