Every damper makes a difference, the sound, the feel and the wt. of the racket.
However, IMO, only RVS dampens racket vibration.
Down side is it is heavy, adds 7g to the throat area, which is good for some rackets, which are highly polarised, and may be not so favorable for those which already have lot of weight in the throat area.
U need to try b4 you know if it's good for yr racket.
i wanted to buy one more lately, but found that it lowers the sweet spot of one of my racket so much that it becomes a rocket launcher near the lower string bed, and very weak near the top.
Most damper therefore is only an expression of characters .