Maybe I dont have so sensible ass, but for me there is no difference at all even by reving engine on neutral. I am using ZF (Sachs) single mass, organic kit at the moment but 8-blade disc on photos was part of NRC development kit I got. It looks like NRC first kit (pressure plate + disc) didnt want to cooperate with stock dual-mass fw. After couple of weeks I will transport my car from Poland to Germany and NRC will get back their clutch + full Oem kit. I am 100% sure that they will use whole feedback and there will be one of most durable clutches coming on to market soon. Single-mass flywheel + 750 Nm cover plate + 8-blade (usable on street too) sinter disc with damping springs with lowest price on market.