You own a Sig. You can likely rent both of the others. Fire all 3 and see. I discovered that the 'wasteful' larger dimensions of the P232 served me well when comparison shopping between a PPK and a Sig. It just felt so much better in my hand, and I shot so much better with it.
But .380 v 9mm? Well...we all know which is more powerful. But which is more shootable? I dunno...and its a question for Sarge55, anyway. Just because *I* cannot shoot a PPK as well as a P232 doesn't mean that someone else can't. And in the same vein, just because YOU find a Kahr 9mm to be perfectly comfortable to shoot, he may not.
Test drive the two you don't have.
Mike
PS when I was shopping for my off-duty gun, Kahrs and Keltecs were not options, btw. My department only allows certain guns.
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"A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects." -Robert Heinlein