Disklavier Mark4 and Mark4Pro has same hammer and Key sensor unit.
The key solenoid and drive unit of Mark4 and Pro is different.
Mark4 Pro playback quality is higher than Mark4.
Adjusting the piano is the most important item if you want to play an hyper amazing trill like this.(ćoć)
1:The acoustic piano action regulation.
2:Disklavier piano action and pedal adjustment.
3:Disklavier Key and Pedal measurement.