Google Photos has to have you specifically opt-in to letting your face surface in other people's photos. It's a setting under "group similar faces" and it says:

"Help your contacts' Google Photos apps recognize your face in photos for faster sharing."

Imo, the problem with Facebook's is that they never told anyone about what was happening and didn't give people the opportunity to opt-in if they wanted to partake in the feature. User consent really is everything, which explains why Facebook got in trouble and Apple didn't. I'm sure Google wouldn't get in trouble if users had to opt-in after being adequately informed.