I have both Netscape 4.7, Mozilla milestone 18, and IE 4, 5, and 5.5.
I originally ran IE (easy to get) when I started with Windows 9x, and can safely say that I don't like it one bit. many little things.
then came netscape 4.x. stable as hell, not many problems, and fast webpage loading (it only shows the webpage when it's done loading, which is fine, cause I'm prone to clicking the wrong spot while a page is loading, and doing something I don't want to do). my only beef is that it's not very compatible with everything, and it takes a bit more time then IE to load.
now Mozilla! still in beta form too!
stable as hell, but I think I found a bug in it. oh well, I'll get the next major build when it comes out, cause I'm very satisfied with it.
takes a bit longer to load then Netscape 4.x (kindof annoying), it seems to take a bit more memory, takes a bit longer to respond to commands like opening a webpage in a new window (could change, we'll see) however is very compatible with everything I've tried so far. XML works fine, DHTML works fine.. etc. I likes! I just hope they can speed it's responce time up, without making it unstable.
oh and it loads webpages while downloading them, making it prone to me clicking accidentally on something when it is still loading. it's quick though, so I don't mind that much.
overall? none is really any better.. I'm looking forward to the next release of Mozilla.
oh and BTW, all these browsers were installed at the BEGINNING of a fresh install, where I've found that is the best time to get any browser stable for long periods of time (over 6 months).