Mast changes, transoms get a facelift, hull paint improves the profile....etc.
I would first like to start out saying the M/Y Time (palmer johnson) was the innovative touch to change the transoms into what we see today. it brought the water line close (down) to another level not yet understood... i believe this was a Tom Fexas design.
it would be beneficial to 'note' these things, as they develop. another point of interest might be the Feadship involvement with the black streak windows that allowed other 'euro' designs to flourish....