Just curious, what are those things that Siri does and Google Now doesn't (except being more conversational and telling jokes, which 'Google Assistant' does too

Just curious, what are those things that Siri does and Google Now doesn't (except being more conversational and telling jokes, which 'Google Assistant' does too now with Pixel phones)? I'm definitely bought over by the Google Assistant, it only improves upon the vastly useful and very smart Google Now already and is going to get a lot better with every release.