Offizieller Kommentar
Hi Vic,
Sorry to hear about that -- the sensitivity should be the same between each deck. There is no adjustable option you can set (as the pads are not velocity sensitive), nor is there an internal calibration for that. The only thing I can think (and this is personal opinion) is that there's been a change to the components used in the manufacturing of the player board (each side is a separate board), and the newer components have a different response.
I would contact the service shop to inquire about that and to see if they can address it.