I'd like to know what the staffers think but it appears to me that RotoGrip stuff overall  is rolly and smoother whereas the Storm stuff tends to be stronger off the spot.

Anyone else?

As a former Storm staffer, I find this statement to be pretty spot on. They compliment each other very well.

Having thrown both sides on the North side of a decade, your assessment is correct, and as mentioned above, they compliment each other very well.

Very easy on both sides and performance levels to build a arsenal knowing the various shapes and motions to help keeping it simple (without all of the confusion of overlap).