title: Fundamental differences between utilizing CoffeeScript `extends` vs. Backbone.js `extend`
body: <p>What are the fundamental differences between utilizing CoffeeScript <code>extends</code> vs. Backbone.js <code>extend</code>?</p>
  
  <p>For example, how is</p>
  
  <pre><code>class User extends Backbone.Model
  </code></pre>
  
  <p>different from</p>
  
  <pre><code>User = Backbone.Model.extend()
  </code></pre>