As none of the combat that I have experienced has involved close range pistol work, I cannot write from my experience, but IMO it's more important to have the same mind than the same tool.
Rust and bureaucrats. Freedom and vigilance. Front sight and trigger. Kindness and firepower. Situational awareness and tolerance. Safety and concealment. Taxes and allegiance. Love of man and surgical marksmanship. Once a soldier, always a soldier.