IMO it's very costly to compare legroom and is often obscured and switched up. Also people might use 'legroom' to also mean more expansive things like shoulder width of their seat, and that is definately not something you can buy with economy plus. Seat width has shrunk several inches and is universally reduced on all airline by now. To get back to 18/19" seat width, you have to pay double or triple, which seems absurd for a 12% to 20% increase in width.