Premium economy ticket on a plane with no PE cabin?
I’m looking at some travel on a BA PE ticket, codeshares flown by American Airlines. However when I look at the seat map on SeatGuru, it shows that this plane has no PE cabin - just the regular coach cabin with 2-5-2 seating. So what does the extra cost “premium” economy ticket get me on this plane? (Already OW Sapphire otherwise).