I would say that my K9 is easier to conceal than my G19 or my newly acquired g26. Obviously peoples shapes, clothing, method of carry vary though. The is not a huge difference though and for some it may indeed be negligible. I concur on your other points however. I know some people will throw a tizzy but I have more confidence in randomly selected glock than a randomly selected Kahr. I proven kahr is a good gun. As I said I have often carried one. It seems to me (take that for what its worth) that there are more issues with Kahrs. G26 is a good carry gun, there is a reason I just bought one. My Kahr fills that role very well also. A kahr will likely take some breaking in and I would want a higher round count than I would with my glocks using my intended carry ammo before I had confidence sufficient to carry a new kahr. That is just my opinion (based on my experiences) though.
Who has copied the design of the PF9 or the P11?