[piri_reis]

Me too, I think they look very much in the correct scale.
What you're doing can rival rivet counting, it's pixel counting.
The angle of the camera, FOV, resolution, aspect ratio, all these will effect the screenshot, I bet you they designed these models almost in the correct measurements, using a 3d program. Why the heck would they make a 1meter tall guy and 2 meter tall engine room ceiling...