OK, wife went to work a little early so I scrambled to take these pics. It was still dark and the lighting was pretty bad. That along with the fact that I had to use a Nexus S to take the pics resulted in some bad photos. Keep in mind their are shadows b/c of the lighting and I didn't have time to perfectly snap pictures from 90 degree angles (need a second pair of hands to do this properly I think). So all those caveats aside, here are the pics.. Also, I have one of those skins on the GSM version, I doubt it makes it much thicker, but just thought I'd mention it.
From top to first pogo pin (mm). Shadows/camera angle make these look different, they look equivalent in person (GSM bottom, LTE top... both with extended battery)
From top to last pogo pin (mm). Same situation as the previous image.
Thickness of LTE version at the center pogo pin. I didn't take a GSM measurement b/c I put tiny scratch in the screen of this one with the caliper.. hopefully wife doesn't notice. (This is with extended battery)
Side by side.. extended battery. GSM looks glossy b/c it has a skin on it like I mentioned earlier.
volume side. extended battery on both. LTE top, GSM bottom.
pogo pin side. same arrangement as previous image (LTE top, GSM bottom)
Batteries (from left to right: LTE extended, GSM extended, LTE standard, GSM standard)
Batteries again. TOP Left: LTE extended, BOTTOM Left: LTE Standard, TOP Right: GSM Extended, BOTTOM Right: GSM standard.
Comparison with standard battery installed. TOP: GSM, BOTTOM: LTE
Backplates & batteries. From left to right: LTE extended, LTE standard, GSM extended, GSM standard. GSM backplates are glossy b/c of the skin.