Caution - Very simplistic mathematics following:
744ER @ MTOW 412 tonnes divided by 307 revenue seats available equals 1,342 kilograms aloft for each available pax seat.
A380 @ 569 tonnes divided by 450 available revenue seats equals 1,264 kilograms aloft for each available pax seat.
WOD, in his post 22, is right on the money. For a horse designed for a specific course the 380 wins hands down.
The 380 wing is designed to carry 650 tonnes, indicating the growth potential for the design. The 380 is the dawn of a new beginning, whilst the 744, as great as she has been, is a 'has been'.
Bring on the B748 to hopefully keep the progression alive.