Bofors and pom-pom strengths matched different air-war environments

Who chose the better medium anti-aircraft weapon, the US Navy or Royal Navy?

Both choices made sense for their circumstances: Bofors favored Pacific range, while the pom-pom suited Mediterranean volume of fire.

Each weapon suited a different air-war environment. The Bofors improved on the pom-pom concept and offered range useful in the Pacific, while the older weapon's volume of fire fit Mediterranean attacks. Both navies also benefited greatly from replacing machine guns with the 20 mm Oerlikon.