Very interesting Mark. Thanks, I learned something. The thing still has a capacitor but is not called 'starting' since it is always in the circuit. From what I read about this configuration is you don't have the high starting torque or high starting current of the switched configuration. Guess that doesn't matter with a pool pump though. I'm wondering if it comes up to speed relatively slowly and thus the pressure spike typically seen on startup is gone? Less stress on the system then.
Al