Was asked in class today why the 747-8i has a different spoiler extension schedule on landing to the 400.
400...all panels extend to max deflection in one movement.
8i...inboards extend half way till either nosewheel has planted then deflect fully. Outermost spoilers are fairly similar. Only the inner speedbrake panels seem to go to full deflection apon touchdown.
Only explanation I could give is maybe the new wing has a stronger pitch up tendency with speed brake deployment while the nose wheel is off the runway.
or, I could be totally wrong, so I said I'd put the question to the experts.
https://www.youtube.com/watch?v=h-pEeHro1Ks