The exceptions would be the Am1 and Horizon split clubs with one end being 2+1 B/C in really nice seats, or the Am1 full B/C car which is nicer than a regular Am1, but not as nice as an LD car like a Superliner or AM2. All Amtrak seats beat almost all airline seats in the width dept. There are some state owned cars in California service that are very similar to Superliners, and 7 Superliners that California paid to repair from wrecks that have higher density seating.