[asenchi2]

I'll write up more about Chef later, but I really look at the two differently. Puppet is really great at managing infrastructure and server state. Chef is really good at integrating with your application (especially if you are using Ruby). I typically think of Chef as a framework to program your infrastructure against. Puppet is more of the middle manager. :)

Both are easy to test, with Puppet winning slightly with 'puppet apply <manifest>'. Chef-solo is nice but takes a little bit more to setup (solo.rb and node.json for example). Either way, test and see what you think will work best for you.