$1$ What is the difference between organizing your data in a list and organizing it in a data extension?

In a list, you organize subscribers by name. In a data extension, you organize them by region.

You can use a list, but not a data extension, to store sendable subscriber data.

A data extension contains relational data, such as purchases. A list doesn't.

The number of data extensions you can create is limited$.$ The number of lists you can create is not.