Hello, @Xynep . . . I have moved your question to this thread where we discuss issues where EMO does not respond to commands. You need to speak clearly and slowly so that he gets used to your particular voice. There is a page where you can submit your voice to help him understand you better.
Keep in mind there are a limited number of programmed responses that he can answer without going into ChatGPT as most regular questions and commands are the ones listed in the various firmware updates including “Small Talk” on this site and the update regarding foreign language. Please have a look around to the various threads to familiarize yourself with what EMO can do. Here are some tips that will help you.
The songs EMO can play are limited to what has been made available in the firmware updates. The most recent update of 2.5.0 allows him to sing and play a selection of different songs but the requests bring up random songs which you cannot specify which one it will be.
I hope this answer your questions. The only difference between a first owned and a second owned EMO is the age, the preferences which you will need to set, getting him to recognize you, a different birthday, and some achievements already unlocked as well as the number of dances he has unlocked.