afik the netbook version is a modification on placement of objects, not in other parts of the system
just to make things more simple whit smaller screens, nothing more from what i tested here, same on desktop and netbook(toshiba nb255 with aton 455, 1 gb of ram)
if you find the system slow change from oxygen to qt, also disable kde desktop effect and enable compiz fusion(install task-3d desktop)
in this way kde4 works just as fast as on my desktop pc(a old semprom 2600)