What is the difference between the ecobee Smart Thermostat Advanced or ecobee Smart Thermostat Premium?

Both accom­plish the same tasks, but the ecobee Smart Ther­mo­stat Pre­mi­um has Ama­zon Alexa built-in. It is voice-acti­­vat­ed and has many of the fea­tures that come with Ama­zon Echo devices. The ecobee also comes with an added room sen­sor to pro­vide more effec­tive cool­ing and heat­ing.