Publishing to Kongregate or Facebook?

Hello.

I have a simple single player TD that I've been integrating into Facebook, specifically for micro-payments (entirely optional, just a way for people to "support" the developer if they so choose). I have the solution working for the most part, but I do wonder if Kongregate is a better place for games like this.

Can I expect more players from Kongregate or Facebook? I know that Facebook has a larger market, but Kongregate players are more interested in games specifically.

Thanks!