As the CalSci is available in four sizes, not sure this is really true.If you mean "better" in that it cuts more wind, then the Manta is definitely better. //
No. Some rain drips in onto the cowling but that's about it. Most of that air goes up the back of the screen, to relieve the low pressure area behind the screen - which is part of what creates turbulence.Will the duct in the CalSci allow rain to get blown in to the rider?