Is OP looking for a true pocket carry gun (if so, look here http://mouseguns.com/PocketAutoComparison.pdf
or is OP looking for a smaller (perhaps also slimmer) gun for some kind of belt carry?
If the latter, add the Walther PPS to your list of guns to consider. It can
be pocket carried (like a baby Glock "can" be) but it's not ideal unless you have huge pockets. But it's amazingly thin and amazingly accurate for it's size and barrel length. In an inside the waistband holster (crossbreed, comp-tac, etc) it disappears - and can be carried with shirt tucked in completely concealed. Size is similar to Ruger LC9, Taurus 709 "slim", Kel Tec PF9, and the P/CW/K series Kahr guns, but it "fits" me better because of more pronounced grip frame "beaver tail" than the others.
for a true pocket gun in 9mm, I think you're stuck with the Kahrs or perhaps the Sig 290 (though I've been unimpressed with the ergonomics of the Sig - doesn't fit the hand well at all). in .380 many more choices, as already discussed.
also there's always the venerable snub-nose .38/.357 revolver for pocket carry - Smith & Wesson J-frame, Ruger LCR, etc.