The PM9 sets itself apart from the Glock when carried in the pocket or on the ankle.
I have a G19 and a Kahr PM9. I cannot see myself carrying a G26 because if I'm going to carry on the belt or IWB I find it just as easy to hide a Glock 19. I tried both guns over a period of time, and went with the Glock 19. The PM9 is carried as a BUG when I have to carry an autoloader.
As far as the longer reset on the Kahr, not for me. I have a NY1 Trigger in my Glock 19. I try to keep all my triggers as close to the same as possible, and since I favor Revolvers it's easy to "justify" the NY1 Trigger for me.
My Kahr, once I got past the "break in period" has been 100% reliable with what I shoot out of it. If it wasn't reliable I wouldn't own it. If a gun is unreliable I try to fix it, have it fixed, or sell it. I have about 1500 rounds through my Kahr in three years. I have only shot 100 rounds through it in the last two years.
Kahrs, unlike Glocks, really need to be properly lubricated. There used to be a thread on this over at GlockTalk that you may want to try and find.
For me, unless you are partial to carrying a "duty size" weapon like I am, I'd go with the Kahr PM9. Most people stop carrying after the "newness" wears off and they realize how heavy and cumbersome that gun is. The PM9 is Kahr's version of a S&W J-Frame Airweight. It's small enough to allow you to carry a gun all the time, instead of some of the time.