Coming from Android, I used to use the Google assistant in hands free situations. Like when cooking or driving. I've found that Siri is TERRIBLE in these situations, because its more likely to punt to give you some links to click on and say "I found this on the web".

I just asked Google and Siri "what temperature do I need to cook fish to". Google came right back with 145F. Siri put up some stuff she found on the web, and didn't give a verbal answer.

I like almost everything better about the iPhone, but I really wish I could replace Siri with Google Assistant.