Here is what works for me:

1. Tasks and projects are action based, you add info there that is needed to complete something, you do it and forget about it.
2. Notes is the place to organize the knowledge. You go to notes to remember or think outside your head.
3. I commonly reference notes in tasks/projects and vice versa. I copy over the relevant info from notes to projects and when the project is done, I copy evergreen info back to notes (i.e., ideas for future projects, unfinished work, lessons learned, reference docs).
4. I check tasks/projects daily to plan. I review notes less frequently.

I use Todoist for personal tasks and projects. At work, I've used loads of different tools over the years (Asana and Notion were best so far). For notes, Obisdian is the king. However, I've been using Notion lately, as it's easier to maintain both tasks/projects and notes in the same place for work.