One other consideration regarding power vs sail cats:

The trampoline!

A power cat has an unimpeded front deck that makes mooring a LOT easier than when you have to contend with sail rigging which ends of being in the way during mooring. Also, the tramp is not the steadiest foot support.
The front deck on the 474 PC was large enough to dance on!
And if you are travelling with inexperienced boaters, tell them to NOT attempt to fend off the boat if a collision with a dock or other boat seems imminent. These powercats are just too heavy to stop by hand.