title: Comparison between Vaadin and ZK
body: <p>Does someone know of a comparison between <a href="http://www.zkoss.org/">ZK</a> and <a href="http://vaadin.com/home">Vaadin</a>?</p>
  
  <p>I'm especially interested which of the two is better suited for a dynamic web app (i.e. where the layout and POJOs are defined at runtime and can change at any time).</p>
  
  <p>Most examples look pretty good if you have a standard POJO (with a fixed set of fields). But how do the frameworks fare if the POJO is replaced with a <code>Map&lt;String, Object&gt;</code> and I need to build the UI depending on the <code>Map</code>'s content?</p>