No such thing in handgun calibers.

.40 S&W throws a larger diameter, heavier bullet. In identical guns, the 9x19 will recoil less, and accuracy is much more dependant on the gun and shooter than the cartridge.

With the proper load, and modern, high proformance bullets, I see little to chose from between the 9x19, .40 S&W, and even the .45 ACP. Much of the anecdotal "evidence" of the 9x19's failure as a law enforcment failure was due to the 147 grain JHP load that many agencies went to. Funny, many of them changed to the "wonder nines" because the .38 Special with 158 grain RN bullets at 750 to 800 FPS wasn't a terribly effective stopper. I can't imagine why the powers that be thought a 147 grain bullet at 850 FPS would do much better!

Proper load, to me, in 9x19, means at least the equivalent of Cor-Bon's 115 or 124 gr +P JHP. If I were limited to ball, I would always carry a .45 ACP, but bullet design and proformance has changed drasticly in the last twenty years.