Also notice Vader's grip in Dave's pics. He's holding his saber left-handed. His left arm looks significantly more bent and more natural, though.
Aside from his hood, Obi-Wan looks literally perfect. The grip, the stance, the face, are all screen accurate. Mat Falls really hit a homerun on this one.
I also noticed that Greg Mowry did not do the Obi-Wan fabrication. I believe that's the first time a SW 1/4 had clothing done by someone other than him. Maybe that's why the cloak looks the worst of all the clothing so far?