I can't tell why this is on the front page of HN. Is the implication that Google would spy on Apple customer's data stored on Google Cloud? Google is evil/dumb/both at times but that's completely outlandish. I do find it interesting that Apple could be one of Google's biggest Cloud clients though, that's very surprising.
Apple has built significant brand trust and brand loyalty on the premise that Apple’s business model is built around devices and services and that your data is not something that Apple is not interested in exploiting/monetizing; Google has a reputation for an antithetical business model in terms of user data.
It’s literally innuendo and conspiracy thinking to suggest they are.