I should have said G5.....those were all the same when it came to roof, C Pillar shape, (rear side window shape differed) trunk and TV panel. This is per Penske who did much of the work under a different division. Agreed side of bodies, nose, hood and front fenders were different for all four makes. G6 has morphed more around the rear 'sheet metal' again...not based on anything really. G6 cars are not symmetrical side to side.....way off!!!