For a while now I've been using subversion for my personal projects.
More and more I keep hearing great things about Git and Mercurial, and DVCS in general.
I'd like to give the whole DVCS thing a whirl, but I'm not too familiar with either option.
What are some of the differences between Mercurial and Git?
Note: I'm not trying to find out which one is "best" or even which one I should start with. I'm mainly looking for key areas where they are similar, and where they are different, because I am interested to know how they differ in terms of implementation and philosophy.