the picture of the grand seiko in the first post appears not to actually be the SBGV007. The SBGV007 actually has the 40mm 44gS style case with polished lug tops:
I think the originally pictured GS is smaller at 38mm and has a different styled, more generic case ...

I think the originally pictured GS is smaller at 38mm and has a different styled, more generic case ...