The guy on the bottom ISN'T Ratzenberger - John's the guy in the top photos who tell's Leia the shield doors must be closed. He's also the same guy in that behind the scenes photo with the X-Wing and pilot BECAUSE he's ALSO the guy who says, "OK, Everybody to your stations! LET'S GO!" And yes, he's also that guy in the close-up head shot posted. He has the mustache. The other guy doesn't, hence the other guy isn't Ratzenberger.
nohandluke
Oh and Ady - While we're on famous ESB debates - Will you be coloring Han's winter coat BLUE or BROWN? Yes, there's a debate as to what color it was...Which is why Hasbro made two different versions of the same figure a few years ago...