What features does Firebug have that Safari 4's web inspector does not?

Question

I'm always hearing that Firebug is the best for web dev. I prefer to use a webkit based browser, and I use Safari 4, or Webkit. I don't mind the web inspector.

That's the background. I'm wondering what features does firebug have that Safari 4 does not?

If it's compelling, sure i'll give it a shot, but i've been working with it today, dont see much difference.

Can someone enumerate, or point me to a place to enumerate the differences?

Answer 1

There is a good article here which shows Safari 4's web inspector and in some places notes differences between Firebug and web inspector.

A big plus (at least for me) is that Firebug can be extended and there are some good extensions here and there.