You can use both in combination, so that render nodes all work on a single image while the master machine you are working on is not involved in rendering. Run the DRServer on all machines that will contribute to rendering, enable "Use DR" in the scene render settings, and submit the job on Backburner to just one of the nodes (never done it myself, so I think that's all that's required). That node will then render the job, using DR (so calling in the other nodes through Corona DR, to contribute to rendering the image).