Tre Kronor benefited from four years of wartime lessons

How did the Tre Kronor class compare in anti-aircraft armament with Town- or Cleveland-class cruisers?

It was strongly armed and benefited from wartime experience plus Swedish weapons expertise unavailable when the earlier classes were designed.

Tre Kronor carried a strong mixed battery, including 6-inch guns, 40 mm weapons, lighter anti-aircraft guns, and torpedoes. Its design and completion dates allowed Swedish engineers to observe several years of wartime combat before finalizing the ship. Sweden also possessed direct expertise through firms such as Bofors. Comparing it with earlier Town- or Cleveland-class arrangements is therefore imperfect because those ships began from an earlier evidence base. Timing and industrial specialization can be as important as nominal displacement.