bottom line-- It's the will and the skill to fight and not the weapon at hand.
It is all variable. Will and skill mean nothing if you get shot through the spinal cord in the process, get ambushed and can't fight back, etc. Recent news events attest to this.
There is nothing wrong with having superior firepower if you know how to use it.
As for the OSS agents during WWII, they carried a variety of weapons. Some may have favored the .32 over the .380, but it was not a universal choice. Some carried 1911s, Hi Powers, or even Lugers. Some carried whatever was obtained locally.
You didn't see the .32 being made into the OSS "Bigot."