I have two Kahrs myself, an E9 and a PM9.
How do you plan to carry the gun? If it is to be carried in a belt holster, the Kahrs, while slimmer in the grip, are really not much easier to carry than the Glock with its extra ammo capacity. If it is for deeper concealment, e.g., pocket or ankle carry, even the "subcompact" Glocks are much too thick, bulky and square for this, IMO, and I greatly prefer the Kahr PM9 for such carry. I bought, then sold a few months later, a Glock 27 because it did not meet those needs, while the Glock 19 (now supplanted by a S&W M&P9C) was just as easy to carry in a belt holster for those times when I want to carry thusly.