Damage profile of Elite 5.7x28mm Protector II (50gr Winchester Ballistic Silvertip) vs Federal .45ACP 230gr Hydrashok.
The FiveseveN is basically a rifle cartridge shot out of a pistol, and has virtually no recoil so follow-up shots are on target. The good ammo while small in caliber crates cavitation on par with .45 ACP. In addition, the 20 round magazines hold nearly 3 times that of the 1911, at a fraction of the weight.
If money were no object this would be the choice hands down. Keep in mind that this gun is used to protect the Queen of England, and the bullpup version, the P90, is used by the Secret Service to Protect the President of the United States. Speaks volumes about this gun and this cartridge.
Forgot to add, I have a PS90 (the semiauto version of the Secret Service) on order, but have been waiting for months.