Speed is the distance travelled divided by the time taken to get there.
Electrostatic drivers move a smaller distance per swing than a coil.
If the distance is smaller and the time instance the same. The speed will be greater.
Both are good so long as they are played in combination with other humans in the same room and a crate of good beer.
IME, differences whatever they are between them, don't matter much in such application.
Sadly, and despite my best hopes, the last chance effort was not a possibility.
The nuclear Thirce-Birds will have to enter Florida by other means
Have a good stout for me