Why the final Caracciolo design carried eight 15-inch guns

Was the Francesco Caracciolo class designed with twelve or eight 15-inch guns?

Twelve guns appeared in the original design, but the final construction design used eight so it could retain speed and armor.

The exchange resolves an apparent contradiction between the video's spoken discussion and specification slide. Twelve 15-inch guns belonged to the original design study, while eight belonged to the form selected for construction. Italy faced a tradeoff between speed and gun count, while armor was retained. The final construction form therefore sacrificed four guns rather than speed or protection.