Classic Aero in mine. The side panels are alu with the leather or other fabric glued to them (been a while since I installed, but there are multiple pieces, but easy to install.
on the seats, there are options. My seats have an integrated seatbacks replacing the stock ones, but you can do just foam inserts too.
All of that said, I really love my interior.
Like many things RV- lots of different options out there.