title: Eclipse Java EE: Difference between R and M1 packages
body: <p>I want to install Eclipse IDE for Java EE Developers and stumbled upon</p>
  
  <p><a href="https://www.eclipse.org/downloads/packages/eclipse-ide-java-ee-developers/marsr" rel="noreferrer"><em>eclipse-jee-mars-<strong>R</strong>-linux-gtk-x86_64.tar.gz</em></a></p>
  
  <p>and</p>
  
  <p><a href="https://eclipse.org/downloads/packages/eclipse-ide-java-ee-developers/marsm1" rel="noreferrer"><em>eclipse-jee-mars-<strong>M1</strong>-linux-gtk-x86_64.tar.gz</em></a>.</p>
  
  <p>Both for Linux 64bit. What is the difference between those packages?</p>