Is there a difference between LoadGen Studio and LoadGen Functional Studio?

 Yes, there is a difference between the two. LoadGen Functional Studio is based on the technology that was created in the LoadGen Studio. 

LoadGen Studio is part of the LoadGen suite that also includes the LoadGen Director and the LoadGen Analyzer. LoadGen Functional Studio operates completely independently. 

The simulations created are not interchangeable between LoadGen Studio and LoadGen Functional Studio.