I've been running on controller because that's what the game recommends, but I'm unaware if there are any advantages or disadvantages to using either.
I personally feel like keyboard inputs for movement are far more precise than controller, though astral flight control feels nicer on controller. Aside from that only minimal aspects like input frequency of my keyboard is most likely higher than controller so for example ledge pull ups might be faster through more inputs per second.
Since the major growth this past week, Slack, Zyrumi, and I are going to add some new categories. The community has shown interest in both a 100% and a Chair% categories. We plan to make this happen, but we still need to work out some of the kinks in the rules. (Glitches or no glitches, what counts