I've lived and worked in both places, I can assure you that the standards are pretty similar. The main difference being that issues in California are generally handled via civil suit, while Germany handles them through a government board.
You're welcome to compare Cal/OSHA regulations:
https://www.dir.ca.gov/dosh/dosh_publications/trainingreq.ht...
To BMAS regulations (and Bundesländer extensions) and try to find something they do to an amazingly higher standard, however.