[ach9l]

The formal grammar structure behind smart assistants is basically the same. Siri is as primitive as Cortana, Google Now and Alexa, the difference comes in the amount of data the interfaces have access too. Outside of the text to speech and speech to text algorithms, there is barely any machine learning when it comes to understanding what the user says. As of it right now comparing smart assistants is equivalent to comparing dictionaries, Siri having less entries and people writing them than the others.