I own several Kahrs, including a newer PM9 and an old P9 covert.
The R9 recoils about the same as a PM9.
The trigger pull is very long but smooth, very similar to a PM9 but the R9 is a little smoother.
The "bite" of the R9 is less, as the rough textured backstrap of the PM9 starts to rub the skin raw on my hand after about 100 rounds. The R9 is smooth and doesn't do that. Although both leave some sore spots after extended firing.
My R9 is more accurate than my PM9, but the difference isn't real-world significant for a carry pistol.
Also I noticed you mentioned the LCP. I think the R9s perceived recoil is somewhat more than the LCP or P3AT but the thinner/sharper grip of the LCP and it's lighter weight gives me the impression of a sharper, more abrupt recoil as compared to the more "pushy" but heavier impulse of the R9.
I know that is not a good technical evaluation of recoil, but it may give you some idea as to how it feels relative to the other pistols.