I have seen some 'lower' rated mass bias balls easily out hook some pretty strong mass bias balls, even with similar drilling's.
Just to name one; I watched a polished Black Widow out hook a Total NV and a Awesome Finish, by several boards on the backend.
I think, just because the mass bias numbers are low, there are other factors to consider (coverstock, surface prep, rev rate, lane surface and oil pattern).
For me, I have never had a ball snap like the BWP on the backend. It just turns sideways for me, and I don't have a lot of hand.
The true test will be in league, our house has one of the most inconsistent patterns. Lately the backends have been strong, so pearl's have been the way to go.
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Ah yes. I have my temporary driver's license - and - my astronaut application form... I didn't pass that though, I failed everything but the date of birth. -Steve Martin (The Jerk)