My opinons based on my findings:
PWC does have more cleaning ability than VM.
PWC is darker and deeper than VM
PWC appears to fill some swirls better than VM
PWC on top of VM does nothing (no change in depth, clarity, gloss)
VM is clearer than PWC
VM does look wetter than PWC
VM on top of PWC does something (depth, plus gloss, with slight loss of clarity- a function of PWC)
For quickie wet look: VM
For quickie deep look: PWC
For deep and wet look: PWC topped with VM (PWC must be applied by machine to get this affect), then apply non cleaner wax of your choice. Affect does not last as long as just using PWC by itself, however. Also, I found that I could not get the finish to really look a lot wetter when I topped ssr1 with PWC.
Please don't ask me how I know this.... things just happend one day :crazy