I have quite a few sets of both. I like them about equally for function except, I don't like the fact that I can't take my expander ball out of the New Dimention dies from Hornady. I like to be able to turn them down a few thousandths if needed to get a proper bullet fit/pull with cast or even jacketed bullets. They usually come about .002" under bullet diameter, but about .004-.005" under works better for a good bullet pull with heavy charges and bullets in large cases. Also, I like to be able to remove the expander and clean inside the die thoroughly. FWIW