title: What's the difference between a Marionette Layout and a Region?
body: <p>Marionette provides two components named <a href="http://derickbailey.github.com/backbone.marionette/#marionette-region">Regions</a> and <a href="http://derickbailey.github.com/backbone.marionette/#marionette-layout">Layouts</a>. At first glance, they seem to provide similar functionality: A location on the page for my application to place subviews, plus some additional event binding fairy dust. </p>
  
  <p><a href="http://derickbailey.github.com/backbone.marionette/docs/backbone.marionette.html">Looking under the hood</a>, it's fairly clear that each component is implemented in a very different way, but I'm not sure why and when I would want to use one over the other. What use cases are each component intended for?</p>