Here's my Medicom and Sideshow R2 comparisson in height and both with the Yoda (sideshow) figure.
Sorry for the crappy pics.
Now,it seems that there was a "SEAM" too on the MEDICOM R2!!
A friend of mine that works on plastic injection told me that this was unavoidable if the dome have some components inside like the electronics/lights and the other in-cased parts. The dome's mold will be constructed in 4-piece/parts,so there will likely to have a seam visible on the injected piece.
Nevertheless, this is the best R2 figure to date and whether Hot Toys will do one...well, will never know yet. So I'm glad I got this one.