Ok. I made it home to a 90s hollowbody II and Archtop and a 2010 hollowbody II. All three have the same bracing and similar carve. The only real difference is that the sides and bracing of the Archtop are much thicker.
Bracing:
There is a mahogany block below the bridge. It is a bit bigger than the one piece bridge in all dimensions, but not by much. On each guitar, the carve of the maple top and back is clearly visible around this block.
There is also a mahogany block at the neck joint. This is about the size of the neck pickup and its standard surround. My naked eye considers them a match in size.
Carve:
The carve of all three tops and backs is virtually the same. The inside is carved similarly to the visible outer carve, resulting in a shaped piece of wood all a common thickness.
Acoustic sound:
This is subjective and how my ear hears my guitars. The Archtop is a bit louder, but not by a lot. It does have a much deeper tone. I won't try to guess how much of that might be physical size versus heavier strings (12s vs 10s). The newer hollowbody is a bit bright than the old one. I've always attributed this to the ebony fingerboard - based on a 2009 with a rosewood board.
Hope it helps.