X.Org vs. XQuartz - MacPorts

After installing MacPorts and some software through that way, I noticed that MacPorts installed X.Org. I've already installed XQuartz years ago and I'm really fine with it. My 1. question is: Do I need the installed X.Org from MacPorts to run software like KeepNote or Gedit, which was installed automatically by MacPorts, or **am I free to uninstall X.Org** and leave XQuartz instead? My 2. question is: What about the other way round? Keeping the automatically installed X.Org and remove XQuartz? edit: changed the question and added a second one.