It turns how the K-Pads will fit. Maybe the Protostar pads are actually K-pads. In any matter, the K-pads on my Dv888 feel slightly different. Im thinking I will try stacking an extra K-Pad on my Protostar.
They feel different, because their different sizes.
DV888 has 888 sized pads while the ProtoStar probably has Grind Machine sized pads.