A while back I was rummaging through the net and DOA for comparison shots of Souldoll Vito, Doubles and Iplehouse YID, EID and more. I came across a link for a website that allows you to compare doll height and bulk.
If anything the dolls were brought to the photographer to be lined up within certain setups and shot (pun intended). I can't quite remember where in Europe is the guy situated since DOA is down and I can't check the post
http://kihaku.fi/heaven/Home.php
I had to use a Dollmore Zaoll to stand in for an Obitsu 50 since Oceammoon's 50cm looks really puny