LoadGen Director for End-to-End Performance Monitoring is different from Director for Load & Performance Testing.
The difference is that Load & Performance Testing uses a scenario to build up the load, and is not repetitive. So a scenario is executed once, and when it is finished, the test run is finished.
An End-to-End Monitoring solution does not use a scenario but a schedule. This schedule determines for how long a monitoring period will run, on which days of the week and between which hours. The vUsers that are part of this solution will be used over and over again for each iteration.