I have and didn't notice much difference, 0406 is formula is set up for dual action and perfect finish is set up for rotary but literally green apple red apple ...
Actually Sonax is now saying Perfect Finish is dual action & rotary use. Most people using it are using it with a D/A anyway. Same as they used to say Cut Max was for rotary machines
Sonax for pretty much everything
For what task ? 😊