It's not a decision. It's an IQ test.
Totally ripped off from Josh Kopelman via TechCrunch.
Dude at TechCrunch is talking about which platform you'd develop applications for.
But it's kind of fun to read it, also, as where to participate more ;-)
In the end, it would come down to where my people are hanging out. Facebook's been better lately. I like the homepage summary so I don't have to surf to each different person's page to see what they're up to.
And the Facebook design's much, much better.