The difference between the two is what happens after development.
Today we’re showcasing an article we think has been written really well.
“In agile, the customer is a member of the development team rather than engaging only at the beginning, when setting business requirements, and at the end, when reviewing the final product (as in waterfall). The customer helps the team write the acceptance criteria and remains engaged throughout the process. In addition, agile requires changes and continuous improvement throughout the organization. The development team works with other teams, including the project management office and the testers. What gets done and when are led by a designated role and agreed to by the team as a whole.”
CoalWorks Official Blog 