There seems to be an accepted wisdom that the A380 is "roomier", especially in long haul economy routes.
My butt tells me this is not so, as do the comprehensive seat pitch/width schedules found in Seat Guru. Sure, maybe an inch here or there on pitch/width between carriers/types but really nothing to warrant the gushing praise for the 380 sometimes seen in these posts.
I take the point that downward pricing has done this. Most non-aviation people I speak to do not know the aircraft type they are travelling in and care even less.