Both good and reliable.
The main difference (in the subcompacts -PM45 vs G36) is going to be thickness, grip shape, slide finish, and capacity. If you want to change to lighter caliber, then the Glocks also allow you to carry a double stack high capacity magazine as backup or for the primary magwhen inthe nightstand for travelling.

The Kahrs are flatter and lighter, but the Glock holds more ammo by 1in the G36 slimline, and by 5 in the G30. The midsize and full sizeGlocks fit me fine, but in the subcompacts I like the Kahrs' fit much better, but that's just me.

Good luck, hard to go wrong with either one.