I'd never rely on the results of a network scan on local host anyhow.

I prefer nMapNT because it just plain works for everyone that I've suggested it to, as opposed to nMap Win which has no installer, no GUI, works poorly with XP SP2, it requires extra software, and frequently requires even more extra software.

People who ask this type of question typically want something simple that just works.

cheers,

catch

PS. Also, when I first formed the opinion, though this may no longer be applicable, nMapNT was faster.