I made video to show how polyphonic aftertouch can be used. It needed some programming on the receiving synth to have something distinguishable. It was fun playing it I have to admit.
On another hand I do own an Osmose, and this is something else. Especially the way that sound can come in slowly while pressing keys gradually. A real pleasure to my hands/ears.
Both polyaftertouch and MPE have their own interest in terms on playing technique and sound.