>>64237868
1 Cataphract (110hp) vs 1 knight (100hp), the knights wins due to 10 vs 9 base attack

BUT in group fights, say 10v10, the Cataphract also deal splash trample damage, so they edge it out here.

You should also consider that its faster to mass knights once you hit castle ages in multiple stables, that being limited to one castle production for cataphracs.