the original version of our high autonomy skillset was a fork of obra's superpowers back in...October? November? of last year. Whenever it first came out.
I think basically all of the best skillsets implement SPACE, including superpowers, mattpocock skills, get shit done, etc. There are aesthetic reasons why you might prefer one over the other, but candidly I think any of them will get the job done and are strictly better than not using one of the SPACE skillsets.
(I haven't played with the latest version of superpowers. My hunch is that on average our skillsets have better compliance rates with the models because of some of the ways in which we write the skills themselves, but its a hunch)
