There is a difference, many ppl in the game dont get the idea of trying out various stuff. Right now we do know some things that may occur in the boss fight. There might be a spot where he doesn't attack you, might be a way to loot before kill, way to cheese a mechanic etc.
People with experience know of such things and do know what to look for, since they have done it before. They did it before, were banned and not shouldn't participate on PTS, that is not a good idea.