The 777 style interiors are not unique to the 747-400ER's in the QF fleet. They are being fitted to the 747-400's as well along with the skybeds.
Have a look at this photo of
VH-OJN upper deck with Dreamtimes and again the
same aircraft after Skybed fitout. Notice the difference in the overhead lockers. The ones on the second photo are what is referred to as the 777 style interior.