The old saying . . . " Sounds just like a TUBE Amp" comes to mind
I don't know but I am a firm believer in the fact that you can't beat the guy who invented the thing.
I still haven't played a trem as solid and touch sensitive as my original Edge on my Jem. That thing is immaculate IME. I literally hold the guitar up with it and everything and have abused it for over a decade. Really killer.