Yes, from the front they all look alike.

From the side view however, none is at true ZERO in "Z".

And the scale.
As you can see I had to scale them all to get to the same shoulder - arm height.

Going this way would have to incude the scaling of the different figures if you want your script to work cross figure.

No problem if you want to put morphs from a certain figure in a clothing that was designed for that particular figure.  The scaling would stay at 100%.

But is was an eye opener for me too that when scaled, they all looked the same from the front view.
Biggest difference is the head size. LOL.
Alysons arms that are shorter then the others.
And V4 with her bend feet.

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!