title: What is the difference between Entity and Model in Symfony2 / Doctrine
body: <p>I am going through the FOSUserBundle. </p>
  
  <p>And I wanted to undertand what is the difference between <code>Model/User.php</code>  and <code>Entity/User.php</code>.</p>
  
  <p>Can't the Model and Entity be same?</p>