Hi Ventuerer. I bought mine in early March, so its possible that the fare is gone, I guess. I haven't been on the site recently to see what the fares are now.

But essentially, the fare came up when I searched for the route. There wasn't anything special I needed to do to get it.

Oh, and I think they are probably the same type of seating, but with different fare restrictions or categories. Somebody may be able to better answer that though.