MovieClips vs SWF's

[doghouseJim]

I'm learning Flash and just started learning AS3. I've written a couple of
simple sites using MovieClips and a couple using swf's as pages. Is there any
compelling reason why one would use one over the other?

[_xchanin]

One reason you would want to use a .swf over a movieclip is that, a .swf can be loaded from an external source.