Why World War II fire-control comparisons are difficult

How did the Pom-Pom and Bofors fire-control systems compare?

They evolved too continuously for one simple comparison; the answer depends on date, director, radar, and ship installation.

Fire-control systems evolved continually during World War II. New versions sometimes descended from earlier branches, so comparison requires following those relationships through time. A single fixed comparison between the gun families would conceal that development.