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He will be around the 163mm mark. The Archetype body is "approximately" 140mm according to GSC. They may have corrected the helmet, but my money is on the camera positioning that makes it look decent on that screenshot.
Baby hands or not, it still roundhouse kicks the McFarlane version in the ass several times. Also the Marauder is allegedly 50cms taller than Doomguy in the game, so the McFarlane Marauder may still scale nicely with the figma