I don’t know. Projects inherently get finished. That’s kind of the point of projects.
Areas are “projects that are never finished”.
A project is “buy Christmas gifts” but I might keep my list of gift ideas in the Areas folder in a file dedicated to tracking gift ideas (which I need because I’m terrible at that). When I get a good idea for a gift I just throw it into my inbox file and move on with my day. Occasionally, I sit down and run through that inbox and file stuff into better places (like the gift ideas file).
Resources are things that you can share publicly. You should be comfortable publishing that folder to the web, for instance.
These are meaningful distinctions for me.
I do use my projects folder like a project list. That’s how I keep track of what I’m working on. I’m pretty absent minded so this system helps me to easily scan that list and figure out what I can do right now on something to make progress.