I'd take an aluminum-frame snubnose with a 2" barrel over the PPK, but the revolver you describe doesn't make it as clear-cut. My main objection to the PPK would be its carryability, not its caliber or action.
Neither of the guns you mention sounds like a true pocket gun, so if you're carrying the gun on your belt, the PPK starts to sound more attractive. For IWB, I might prefer the PPK.