Differences between A6 and A7

[A6sport]

My bad, guess all the A7s I've seen are regular bench in the back. I thought the RS7 with comfort seats came with 3 in the back til I saw one.

I believe it all changed in MY 2013/2014 the A7 rear bench became standard in NA because so many customers bitched about the lack of a third belt in the rear.