VulnKBdiff makes CVE-based comparison for Nessus, OpenVAS and NVD Knowledge Bases. You can see the results in my telegram channel.
WARNING!!! The only catch is that I am getting Nessus CVEs from Vulners collection, NOT from NASL plugins. This means that you will need to have your own commercial/researcher Vulners license for this and set in api_key variable. ¯\_(ツ)_/¯ If you are interested in such license contact sales@vulners.com.
Well, it should be possible to get Nessus plugins for analysis from an existing Nessus installation or by using all-2.0.tar.gz file, but I haven't tried it yet. The publicly available nessus-updates files are not good for this because Tenable releases them with more than a month delay and they are not in fact in valid tar.gz. 😕