• Siri works by sending your commands to Apple servers, which in turns execute the commands on your iPhone. Siri allows you to use your iPhone with just your voice.

  • Voice Control, however, can be accessed for the basic yet much more limited in-phone purpose such as on-screen gesture controls, overlay and hints display.

  • Therefore, Siri requires Internet connection to be activated because of its cloud-based features, while Voice Control doesn't need any network connection to function.