Don't forget that the Red Zone basically has a skid/flip type of reaction (due to the core and the highly polished stock finish), while the Pyro has an arcing type of reaction (due to the core and the partilce load). This is just IN GENERAL.
So the ball path and reaction of the RZ will be much more dramatic, while the Pyro will be more about control. A very high average friend just loves his Pyro, first ball out of his bag. I haven't tried either one ... yet.
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"None are so blind as those who will not see."