the only thing I would point out is the difference in blade shape, the Addict 2 has a taller blade, wider, closer to the height of a typical western knife. Even though it is a thin bladed, light weight wa handle it is good for large hands where your knuckles will have plenty of clearance. The Ultimatum is a lot less tall at the heel, maybe too much in the direction of a suji for some people's tastes. I suppose what most people are used to, that is the most typical gyuto shaped blades, are somewhere in between these 2 extremes.