I can’t answer that, but I can tell you about the one feature that is most impressive in all the new stuff I’ve demoed. The ability to slide your hands is priceless. So much easier to ride, pump, do everything really.
So boom-ish designs.
You can slide both hands for optimal trim, with the Echo, Ensis, Cabrinha Mantis, Epic, Airush, and rear hand only, a little bit, with the Fone Strike.