380 versus 9mm
I had a Ruger LC9, it was butt-ugly, 6 1/2 inches, not bad to fire, and most importantly it was dependable. And I have a Sig 232 in 380. I prefer the Sig because it's DA/SA and comes out of the pocket fast. And I imagine the smaller guns function better with a .380.
The 9mm is a better caliber, but it needs a bigger gun. The Rohrbaugh in a 380 would seem like a dream gun (small, safe, DA).