I own both a PM9 and a P-11. I have good and bad things to say about both, but the P-11 has won out and I sold the PM9 to buy a second P-11 and ammo for practice.
- Concealment - obvious Kahr wins this but I think the P-11 does exceptionally well there too. I do not prefer pocket carry except with a limited number of the pants in my wardrobe. My preferred method of carry is
www.smartcarry.com. I have large hands and the PM9 was actually getting a little lost in the waistband. The P-11 is the perfect size for the smartcarry. And it works when I need to carry in a pocket. Normal carry for me now is a P-11 in the waistband with the belt clip or in the smartcarry and a p32 in the pocket. No extra magazines, just a NY reload.
- Shootability - the Kahr trigger is a world apart from the P-11, but I didn't start to shoot the Kahr really well until after I had mastered the P-11. The KelTec trigger is a major turn off for some people. I went from hating it to loving it. Learn to shoot your P-11 well and any other gun that you pick up will shoot 10 times better in your hands than it did before. Seriously. Shooting the P-11 is a workout and it strengthens your hand, your finger and your fine motor control. It's exercise man!
- Reliability - Had issues with all three of my kahr guns. The PM9 and the P40 both had to go back to the factory. The P-11 had to go to the factory and came back with a bungled night sight installation. If everyone could make a 9mm as small as these two guns and pull it off without a hitch every time then everyone would make them. The PM9 was ammo sensitive (feeding problems with long cartridges) and P-11 would feed anything. The P-11 mags rattle if you have 9 rds in them but don't rattle with 10 rs or less than 9 rds. That's annoying.
- Price - well, that's obvious. You can buy two P-11s used or new for less than one used kahr PM9.
- Options - there are a zillon more holster options for the P-11.