Tosa versus Amagi: protection traded for speed

Both designs carried ten main guns, but the battlecruiser devoted more space and machinery to speed while the battleship concentrated its layout around survivability. Tosa's machinery and superstructure were more condensed, while Amagi's two funnels show the greater volume assigned to propulsion. Tosa had an 11-inch belt and four-inch deck, compared with Amagi's 9.8-inch belt and 3.7-inch deck. Amagi gained 30-knot performance while Tosa reached 26.5 knots. The comparison shows how protection, subdivision, and propulsion define a ship's intended role.