I understand the trouble. In Logseq, I do not see much difference between tags and links [1]. For Org-roam, tags seem to have a different meaning and usage from Logseq.
For your purpose, I would have a note for each system and write my findings there; no links or tags — I don’t write stuff for long-term memory in a daily journal. One is for storage; the other is for flow. If you have a reason to do so, I’d use a normal link and use backlinks to display them later.
Here is my definition and guidelines for tags in any note-taking system, which I apply to Org-roam (as well as any other). I don’t use tags much.
The difference between [[page links]], #tags, and properties:: - Documentation - Logseq
If you’re anything like most people who first come to [[Logseq]], you may be wondering what’s the difference between a
[[page link]]
and a#tag
Truth be told, the difference is primarily visual. For the most part, they are both the exact same in functionality. They both link to another page. If you click one it will take you to another page and both will appear on the linked references of that page as well. ↩︎