VNC vs NX client window display result

I have both TightVNC client running and NX client (NoMachine)on XP - I can connect to my headless 10.3 (gnome) box. My question is about the ‘quality’ of the client window. The VNC window is much clearer, crisp, the NX client window is not nearly as ‘easy’ to look at the text and icons are ‘fuzzy’

VNC is 1024x768x16
NX is 1024x768x24 (I think it’s 24)
Fonts on the ‘headless’ desktop are set @115% and ‘best shape’

What settings could be changed to improve things ?

Or does KDE work better?

Thank you