Jaapii wrote:
The only advantage that I know of is
higher crit on chinese weapons.
Sos is equal to +5, som to +10, sun to +15.
Though, higher items have higher base values, thus, a 64 sos+3 is not equal to a 72+0. the 72+0 would have slighttly higher attack values, and also have a higher reinforcement, reinforcements also directly influcent your damage

so a sos+5 still owns a normal +10, coz it has the reinforcements of a weapon 5 levels higher ^^