While the Rg and Diff. are important to a bowling balls performance the coverstock and the surface of the coverstock are the most important factors in bowling ball reaction. Compare the coverstock to a good pair of tires and the core is the engine. It does not matter if you have a super powerful engine if your tires are bald and just spin, and also if you have huge super tires but a weak engine that doesnt work either. Not the mention the USBC changed the maximum differential to a max of .047 I believe and I am sure that Rotogrip is getting their equipment in line with this new ruling. Also if the new coverstock is quite strong they may have had to tame down the core to "match" the coverstock better. So it is difficult to conclude how a ball is going to react until you actually put some holes in it and throw it down the lane. Just take a look at all of the balls in the industry that have similiar core specs are behave totally different because of coverstock formulation. For example, the Storm VG and the Storm VE have the same exact core specs but because of the coverstock difference these two balls are TOTALLY different in reaction. I will surely be buying the Mutant cell when it is released. This line of balls have been nothing short of excellent.
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