Comment by lutoma
The difference is that the previous non-profit was a not-for-profit corporation (gGmbh). This legal form is roughly analogous to most US non-profits (501(c)3 Inc.) and meant that as founder, Eugen Rochko still had more or less full control over the organization.
As I understand it, the new organization is supposed to be a non-profit association (e.V.), which is a distinct type of organization under German law that enforces democratic decision-making and enables people to become voting members of the NGO.
It's a bit difficult to explain as there is no analogue in most common law systems (sadly).
The Open Home Foundation (Home Assistant, ESPHome, etc) is a similar contemporary example. It's organized as a Stiftung in Switzerland, which as I understand it is somewhat analogous to a US 501(c)(3) private foundation, in so far as it is an independent legal entity that can't solicit donations directly from the public and isn't necessarily run democratically like an e.V.
There are non-profit associations in the US (notably 501(c)(6) business leagues) but I don't know enough about them or about e.V. to speak about the differences.