Thanks for sharing, we're happy to see other open source automation tools! The projects are unrelated but you can find similarities between how OSS projects are generally structured as they get inspired from famous existing examples.
As to the fronted, I took a look and I think there is a big difference between the two. The UI is very different and one of the projects is built on React while the other is Angular.
ActivePieces:
- https://www.activepieces.com/docs/
- https://github.com/activepieces/activepieces
Automatisch:
- https://automatisch.io/docs/
- https://github.com/automatisch/automatisch