I think you all are reading more into this that Apple is claiming. Apple is claiming expanded access to genuine parts and it seems they are delivering that.
"Apple said Wednesday that 140 businesses with 700 locations have signed up for the program in the United States. Some of the independent shops, such as uBreakiFix, have multiple locations, while some are sole proprietorships."
That seems like expanded access, for shops and customers, to me.
I guess that they can't legally claim it's inferior, because of how dreadful their service is in comparison to Rossmann. Apple wants to level the playing field to the bare minimum, i.e. their official repair quality standards.