How can I compare taxonomy reference fields on two entities?

Sounds like both taxonomy fields are multi-value?

If so, you would load the list of values of the first entity into a token. That token is a list then.

Then, you load the list of values of the second entity and start a loop by going through each of those values and check if that's contained in the token that you created above for the first entity.

How to build loops is shown in a lot of sample models at https://ecaguide.org/library/ and in some of the videos at https://tv.ecaguide.org/

Thanks. This is helpful. I found sample models with lists, though I couldn't find a video. Can I say that the videos have been incredibly helpful in teaching me how to use ECA (site builder here - not a dev) and it might be useful to include one with a list.

Here is an example video with a list that comes from a view: https://tube.tchncs.de/w/jnzoru2XFHgpoToQB5P6AT

Here is another one: https://tube.tchncs.de/w/8dZuXYZHmuDTutddrTZUfE

Sure, adding more videos is what we always want to do if we find the resources to do so.