I'd be surprised if there is any real difference in how either company respects your privacy (neither does). But for the most part, google seems to do its thing in the background and leave you alone. Microsoft is constantly popping things up asking you to rate this or that, flinging things you didn't ask for onto your screen, basically the spirit of clippy reborn into modern data collection practices. If I'm going to have my information exploited no matter what I do, I'd rather at least have it happen unobtrusively.

(To be fair, this is just my perception. I was in a g-suite shop for three years and now onto office 365 and I feel like it bothers me about stuff way more often the g-suite ever did)