title: PCLPointCloud2 v.s. PointCloud
body: <p>I want to know the difference(s) between <strong>pcl::PCLPointCloud2</strong> and <strong>pcl::PointCloud</strong> in <a href="http://pointclouds.org/" rel="noreferrer">PointCloud Library</a> (PCL). There is a function to convert from one to another, but the documentation is very poor.
  I would like to know, which one is newer?</p>
  
  <p>p.s. (I am not talking about ROS)</p>