Notice here the lack of the little storage space by the shoulder (usually for headphones), surely due to space requirements.
Don't recall that "step" sort of thing on the 744 below the foot-cubby
Tray table step one: press the button
Tray table step two: pull out the tray.
Tray table step three: unfold the slightly smaller than the 744 tray
Smaller storage area
Central screens...no need for 744-style manual demo now
Flat position
Reclined position
Also of note was that the alignment of the windows with the seats seems much better on the J side than the A side.