Board Thread:Metal Gear Solid V/@comment-109.193.182.64-20150922080055/@comment-1971498-20151028121428

I've had a close look at Sahelanthropus's design in comparison to Rex and while they're visually similar, Sahelanthropus was purposefully put together so it could stand upright. On the other hand, this isn't the case with Rex, where it's purposely designed to hold a horizontal positioning (the placement of the weaponry and "backpack" contradict those of Sahelanthropus). So yeah, I honestly think there wasn't deeper meaning between the similarities of the two Metal Gears aside from the seeming likelihood that Kojima simply liked Rex's design and wanted to turn it into a traditional-looking mecha for the sake of "rule of cool".