Concerning the height difference of the screen between the engine room and the pipe area, take a look at the position of the lower horizontal pipes as well, they're high in one pic than the other. Maybe they used a different 'wall with screen' wall, which shows less horizontal pipes, and is higher in frame.
As strange as it sounds, the render still feels smaller, even though your comp looks perfectly lined up. Bizarre.
Have you tried modelling it to the stage plans then using a camera match plugin (worley has one) to set camera position and lens? I'm tempted to try that some day.