there isn't anything specifically for FCP for this, (there's an argumant for Cinema Tools, but lets leave that for now)
but as you are tlakling about EDL's it doenst matter.
all you need is a solution that compares 2 x EDls and creates a change list.
there are quite a few solutions for this,
and most of them are quite expensive, and not worth it for a one-time use.
there is one other that i know of that is probably perfect for what you want.
EDITRACE
this can work as a downloadable app (that costs a fair bit)
OR it can work as an on-line service.
for a one-off fee, you up load your EDLs, and the software comperes them on-line, and gives you back a change list.
Editrace also offers a free app that you feed the change list into,
and it will auto-conform your protools session.
the sound team used it on the last feature i edited,
they were happy.
cheers,
nick