The most immediately visible difference is blade geometry. A katana features a pronounced curve (sori) developed to maximize drawing efficiency from a hip-mounted scabbard, while the ninjato has a straight or minimally curved blade that delivers a distinct, angular profile. The ninjato also typically features a squared tsuba rather than the rounded guards common on katana, and a shorter overall length. For collectors, this means the two forms complement rather than duplicate each other on display - the katana reads as classical and ceremonial, while the ninjato carries a more austere, utilitarian visual character rooted in the mythology of feudal covert operatives.