Just wondering what is the reason people choose 380 over 9mm when buying a new gun. Way I see it, they are almost identical but less power on 380. Ammo cost is a definite advantage to 9mm supply availability and price wise. Potency wise, I think 9mm also has advantage. I can understand if they already got the gun but when buying new...is it the recoil? More compact? Just plain choice? What is it?