good point - maybe it is just that the others have to be able to swivel to allow the guest to sit in them or something, but the back two definitely do look different .... also, that guy in the back right one doesn't seem to feel the need to pay much attention to what buttons he is actually pushing - at least he is smiling
also interesting they are showing shorter people in the back with the tallest in the middle seats - would think that would impact how well the people in the back can see out the front. I know this is just concept art so probably means nothing but, I mean, over-analyzing is kinda what we do