I think the wrong two sports are being compared here.
AFL and NFL should be the sports where elite players of each may be transferable to the other code. An elite wide receiver in the NFL could cut it at AFL level. Incredible speed, particularly acceleration, height, good build, great hands, ability to catch the ball with contact. Obviously the kicking would be a problem. Conversely I think an elite AFL forward could play in the NFL. Carey in his prime could have been tought to become a pretty good tight end. I'm not sure of Lance Franklin's acceleration numbers, hands or his agility but he could possibly become a decent WR.
AFL and NFL should be the sports where elite players of each may be transferable to the other code. An elite wide receiver in the NFL could cut it at AFL level. Incredible speed, particularly acceleration, height, good build, great hands, ability to catch the ball with contact. Obviously the kicking would be a problem. Conversely I think an elite AFL forward could play in the NFL. Carey in his prime could have been tought to become a pretty good tight end. I'm not sure of Lance Franklin's acceleration numbers, hands or his agility but he could possibly become a decent WR.