Hi Jorge,
Thank you for contacting Syncfusion support.
Query 1: What is the difference between "ASP.NET MVC" and "JavaScript" from Essential JS 1?
Response: Syncfusion ASP.NET MVC controls are server-side wrapper for the Syncfusion JavaScript controls. You can learn more about the it in the following links
Query 2: Does the "ASP.NET MVC" collection of controls include the "JavaScript" collection?
Response: Yes, ASP.NET MVC controls include JavaScript controls. Since our ASP.NET MVC controls are serializer from the server-side wrapper into JavaScript during runtime, the actual control rendering takes place through JavaScript. So we can use directly use them as JavaScript controls also in the MVC application.
Please let us know if you require any further assistance on this.
Regards,
Prince