No question, get the P239. It is a professional's gun, where as the P938 is really more of a novelty, IMO. They're cute little guns, but not to be confused with a professional grade gun that can be pressed into serious shooting. You have your defenders of the little gun, and it has its place, although not in my inventory, but I think you'd be much better served, and happier, with the P239. The P239 should be easily concealed on your frame with shorts and a t-shirt. I am 5'11 200 and conceal a G19 quite easily and comfortably, which is somewhat larger than the P239. I think the P938 is really a waste of time, as a defense gun. Better than nothing, but not much, FWIW.