So, I first bought a PC and it did a good job, I was not 100% pleased with it, and I saw in the manual that I could return it within 90 days, no questions. I aranged to get a refund and ordered a Griot's 6" to compare. I know this question has been asked several times, so I thought I would post my findings. Thanks to AG for delivering both polishers.
Please do not think I am a PC or Griot's homer, as I offer a third person view, I do not like some Griot's products, some I do. I am not a big B&D fan either, but I have plenty of their tools.
I prefer the Griot's, it has more power, it fits my hands better and the backing plate is closer to the size of my pads. The instructions are clearer and the bail handle it easier for me to hold in position on vertical surfaces.