Well, there may be more to it. Some steels handle various hardness levels better than others. Grain structure, toughness, tensile strength, etc, may all be factors.
From what I recall, some feel that 1095 isn't as good of a steel as others for a sword because it tends to be more brittle than the other 10 series steels. Makes great knives, because it's got solid edge retention, but higher brittleness isn't a good thing in a sword.
My buddy Ricky from HSTS sells USA 1095 katanas that are differentially hardened. They stand up quite well to hard bamboos.
I've also used several 1095 swords with good effect.