I’ve used Aquamacs for the past four years or so. It has its strong points.
But I’ve always been a little unhappy with its slow performance relative to native Emacs (I use a MacBook Pro), and its unique initialization and behaviors. I’m sure there are good reasons for every difference. But each difference is a little more cognitive load. E.g., I never got used to M-x Info opening up in a new window somewhere on my screen…
Today, I decided to try Emacs for Mac OS X. Whoa! I love it! It’s Emacs, the whole Emacs, and nothing but the Emacs. Win!
I even donated $50 to the project. So there!