How do I reply to this discussion repost?

In our previous discussions we noted there are similarities and differences in the roles of Agile and Waterfall methodologies. The main difference is that Waterfall is a linear system of working that requires the team to complete each project phase before moving on to the next one while Agile encourages the team to work simultaneously on different phases of the project. The waterfall method consist of requirements, design, implimentation, verification and maintenance. The agile method consists of scrum, kanban, extreme programing, lean development, and crystal. I have decided to compare and contrast the verification method in waterfall and lean development in agile. Both of these phases consist of reviewing the project in a wide angle view to ensure everything is correct and performing as required. While the waterfall thought process focuses if the completed process works as designed, will it continue to function when at the end user, and will there be customer satisfaction the agile method scrutinizes the processes of development to ensure there are no wasteful steps during the functioning.