Nothing concrete from what I can tell. Becoming a hard fork is relatively recent though (mid-November of last year, roughly).
As a side note, I understand why Gitea and Forgejo went for a “copy GitHub Actions” approach to their CI, but man do I wish more self-hosted repo software tried to copy Drone/Woodpecker instead. Iterative containers in the pipeline is such a smoother build experience, and it kind of sucks that Gitness is the only one doing it (that I know of).
Photoshop does a lot of things in really stupid, convoluted ways. Krita also does a lot of the same things in equally stupid, convoluted ways, but different than PS so you get no benefit from knowing how its done in other software. Text editing comes to mind. Both PS and Krita feel like they were designed by drunk people when it comes to doing anything beyond writing text and picking a font/color/size.