Allow regular user to archive (or close) their own topic?

I was searching here regarding ‘archiving’ topics, but I found now that this was discussed a bit already in regards to ‘closing’ topics - https://meta.discourse.org/t/closing-own-created-topics-for-users-at-level-3/12414/8 - where in that discussion it was basically decided that it was not good to have the power in general for users, but it wasn’t discussed on a per-category level.

By the way, I can’t find the definition/function of closing a topic vs archiving a topic. What is the difference?