At a glance its quite apparent that the front and rear seats aren't interchangeable. I'm hoping the front seat covers are, I picked up front seat covers from MASSHOLE a few months back with intention to use the passenger side cover on my driver seat. Unfortunately I can't do anything about the holes in the side sections that the passenger side seat adjustment knobs pass through but at least they will be concealed by the center console.
Have you even opened the back doors and looked at your rear seats? They're noticibly different from just a 2 second glance.
As for TJ's question with side to side on fronts, pretty sure they're different as well. The seat back might be okay, but the seat bottom is definitely slightly different between the two IIRC because the exposed side is usually leather and the hidden side more carpet material.