Short-barrel .380 v 9mm

This may have been discussed before, but, hey, why deny you a chance to pontificate?

At bad-breath distance, is there any real advantage in the 9mm over the .380 acp in short barrel autos? Say 3.5" and under? Don't doubt someone can show the greater velocity/energy of the 9mm. But I'm talking about the incapacitation effect. Is there a real Practical advantage in stopping an attacker at arms close distance? Does the extra "umph" necessarily translate to quicker stops?

Thanks,

.38Catt

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