I have the G26... my friend has the CM9 which is a less refined PM9.
The Kahr is thinner and easier to conceal.
The Glock is heavier but recoils much less.
The Kahr looks weird with +1 mag.
The Glock looks like a short barrel G19 when you use +2 mag.
The Kahr has long, smooth trigger pull.
Glock has 2 stage Glock trigger pull and therefore much shorter reset.
Both are dependable. Both have decent sights.
Kahr comes in different finishes.
Glock has more readily available accessories and compatability with bigger sibblings.
You can throw in a 33 round mag into G26.
Glock feels nicer to hold to me. Ultimately you have to decide what you want it for most.
Comfort and concealability probably the Kahr.
Better feel in hand and while shooting yet still concealable... Glock.
If you can shoot both before you buy, that would help you a lot, I like the Glock better as a gun but it isn't as easy to conceal as the Kahr.
The Kahr isn't bad as a gun but doesn't feel as solid while holding or shooting.
Decisions, decisions... If you do get the Glock, and you don't like it... you can sell it to one of us.
Oh, P.S. Kahr magazines have a gap between floor plate and grip about the thickness of a quarter when inside weapon and thus have a little play. This play did not cause weapon to jam but did pinch pinky occasionally while shooting. Not painfully but annoyingly.