The weight of * ball will be less than a ** ball which is less than a *** ball. At our club, we use **** balls which are heavier than ***. I sometime feel I'm hitting a golf ball when I play a **** ball. They travel faster too.
I think the performance of a ** ball between DHS and Nittaku differ. There is a possibility that both brands perform the same if they are coming from a same company. Isn't DHS a Chinese and Nittaku a Japanese company? If that is the case, there would be a performance difference.