Both Bluetooth and WiFi allow to connect the coffee machine to the mobile phone, so you can control it remotely.

The main differences are:

- Bluetooth relies on the Bluetooth technology to connect and communicate with the coffee machine locally without the aid of the cloud (hence you don't need to create a user De'Longhi account in order to use it);
- WiFi, on the other hand, relies on the internet connection to communicate within the cloud and the coffee machine, so you need to create a De'Longhi user account in order to login into the App and control your WiFi machine.