I own three KTs:
P-40 (P-11 turned into a .40SW steroid freak, no longer made)
2x P-32 (.32ACP, one for me, one for my wife)
The P-40 started off a drama queen, but a throat polish job made it reliable. Kicks like a mule...I'm talking ".357mag in a scandium snubby" recoil.
The P-32s have all been reliable as rocks. Best dang .32ACP pocket pistol out there, IMO.
If you are going to carry in your front pocket, the PF-9 is the way to go. I do carry my P-40 in some pockets, but they have to be generous. It is more likely to ride on my ankle or IWB Mexican-style, due to the side clippy deal.
Other than the Rohrbaugh for big bucks, there is no 9mm comparable to the KT PF-9, size & wt-wise...the closest is the KT P-11.
OTOH, the weapon most likely to ride in my front pocket is my Taurus .357mag titanium snubby, the 651SH2. In retrospect, I'd likely get a SW642, due to the greater availability of accessories, especially holsters. There is a reason snubbies have been wildly popular for decades.
I tote the P32 as a last resort, or as a backup to a more substantial ankle-carry weapon.
If you do have a problem, KT will make it right. Their customer service is second to none.