I legitimately think the answer is - - Experimental/novel SD features, Automatic typically has them first - Better UI/UX and exploration/gallery workflows, Invoke.

From a feature perspective, both have their own flavor of certain features.

Goal of Invoke is to eventually have prompt/concept library, a node-based workflow UI (with the ability to share techniques), etc.

It’s kind of a - switch if you want a better UX now; keep an eye on it if you want new workflow solutions long term.