I always felt a difference, even when it was brand new. It needed time to break in and 'soften up'. The original feel was harsh, harsher and really really stiff. After a couple thousand miles it got to where Comfort was soft on a non-bumpy road, Normal was not bad, and Sport was just stiff. But I could always feel a difference.
That is solo with it set on 1 helmet. I weight about 210 without gear.
With a passenger (and set to two helmets) the difference is even more striking, and all the settings tend to feel too soft/underdamped.