Emacs VS Sublime Text 2 (on PC)

hey guys! stackoverflow and stackdeveloper doesn't seem to want me to ask this question there. So I guess here is the last place where I'll be able to find answers!

I'm struggling to find a VS between emacs and sublime text.

The only difference I've found is it's easier to use sublime text. I don't care about easiness but efficiency. I've watched a bunch of emacs video and it seemed really efficient, played a bit with it but didn't really dig into it as I found a lot of people talking about sublime text.

Also I'm on windows, is emacs the same as on ubuntu or is it limited in some sort?

I'm thinking about programming in c++ with it. (I've also seen people using emacs to browse/post on HN, how do they do that??).

Thank-you!