ooo.. the difference has always been big for me with external and inline CSS, thats why my pages just link to the master CSS and any other local CSS pages, so no inline stuff, frontpage, which sucks horribly, always does inline, dreamweaver does too, but not to the extent...
anyway i use :
DzSoft PHP Editor and Source Edit
to code my pages with some help from dreamweaver, these too programs work nicely with my PHP coded pages...
anyway clover, most professional\'s who care about the quality of their pages, me, dont use WYSIWYG, as they tend to add a lot of extra things, and make it too easy, when i meet a problem in some code, any coding language, I like to shift through 500 lines of code by hand and fix it...
so anyway... external > inline