Ok. Now face Ren with her staff versus Kylo Ren. And let me know whats happens. Duh.
It was an example. Rey hits harder than Darth Vader. The highest attack from Vader is Lightsaber Throw. If the opponent doesn't have any down effect, then the attack hits much less. Is not the same with Rey.
Or Mace Windu, the high attack of Rey only compares when Windu hits when he unveils a character. But with Rey this happens all the time, and without unveil anything. And with a staff.