BTW...If your a non-American reading this, 9mm v .45 is a thing. I've seen fist fights break out over this! Full disclosure I'm a .45 guy. I wasn't trying to start an argument though.
Will be debated til the end of time. I am a .45 and 9mm guy. I have no use for the snap of a .40. 9mm doesn't feel like a whole lot of recoil and the .45 feels more like a push to me rather than a snap.