[Gianluca Barbaro]

I have made a little comparison video between the Yamaha P37D e the Hammond Pro 44H.
There are actual differences in the higher harmonics: how they map to timbre differences is a little difficult for me to say.
In the last part of the video I play a B on the Yamaha and change the oral cavity shape (and resonance): as you can see, that way we can control the volume of the harmonics (especially the first ones, but notice that the fundamental is constant) thus changing the timbre a little bit.