Just watched a recording of a talk on #solid, a set of standards for decentralized #socialweb. Anybody here who knows both #solid and #activitypub and would be willing to explain the differences, pros and cons of each approach?

I'm also thinking of adding a comment section to my blog (I've got a domain migration planned, afterwards I'd like to add more content and maybe features). I was thinking of looking at #webmention and #indieweb.
How do those technologies fit into the picture?