The lines between the apps blurred even more since I posted this… But that is a good thread to browse. New versions of both apps will be a lot different, from what I’ve read…
They are not mutually exclusive. Echosistant was born as an addition to more mature Ask Alexa app. Features within Echosistant are not available in Ask Alexa, although they can be achieved if one likes to tinker with the app with one major exception: the text free. Echosistant is capable of transmitting a full message to ST, which can be used for sms or to be broadcasted to Sonos speakers via text to speach service. Another feature of Echosistant that is not available in Ask Alexa, is the ‘Alexa Feelings’. You can use phrases like I am cold/ I am hot, is too bright, is not dark enough, that can easily be fine tuned in the app to suit your needs…