In my opinion it's all marketing. I think that's obvious. Companies try n come up w something different in order to separate us from our cash. Lots of times something being just a bit different does just that. Look to the hunt industry n remember all the short rounds? Super shorts, short mags, super short mags, ultra super duper rounds. Anyway it's all good but how many of those rounds are still popular, or how many were needed? How many are now for sale or discontinued? I believe a white hen will go in time by the wayside