Hi
Had the same problem..I found I needed to adjust my playing on the electronic kit. The surface of the electronic kit are harding and less forgiving.
That being said...I found the electronic kit and associated sound tracks and metronome to be very easy to work with..for the development of my playing..Easy up on the power playing...Denis
Use light sticks, there is no need to pound the kit like an acoustic. If the 9 has rubber pads, the shock will come back through the sticks worse than mesh.