While I like the feel and slimness of the PPK or the PPK/S, I find them heavy for what they offer, and never found one 100% reliable. It seems that it made no difference if it was an older German made, S&W, Manurhin or an Interarms, they all jammed, even with ball.
I would take the 60 all day long, stuffed with Buffalo Bore 158 grain LCWCHP +P's.