The 1940 design was slightly larger and heavier however it was planned to install a slightly more powerful power plant to keep or exceed the 1938 design performance. Both main designs, along with a few design variations, planned the main artillery layout of 6-5.9 inch guns in 3 double turrets: one positioned on the bow and the remaining 2 on the stern. This was to allow a more offensive retreat, as these vessels were designed to scout ahead of the Plan Z battle groups.