Between the two I'd opt for the 5 Shot Revolver every time. :)
I have a Kahr PM9 for "Pocket Carry" but find myself carrying the Airweight J-Frame. I think I carried the Kahr three times in the past year. There is nothing wrong with the Kahr, but I do believe the "edge" in reliability goes to the Revolver in the smaller guns. Also, I have pulled my PM9 out of my pocket only to find the magazine has been released. That gives me a "One Shot Bludgeon".
If the options were for full size "Duty Size" guns than it would be a different story, although I'm partial to the Revolver there as well.