I'd guess-timate that you, with the your virtually cranker release specs in your profile, will probably see a little bit more length in the SS Pearl over the Pro Stock pearl, plus a little bit more backend. That difference would depend a lot on the oil pattern, and it would be a relatively minor difference.
Both balls will probably be flippy for for you, but you might try a control type drill, maybe 3" x 5" or thereabouts or take a green (600 grit) Scotch-Brite nylon pad manually, AND LIGHTLY to the cover to make it grab the lane slightly earlier. Both balls should fit between the X and the ThunderFlash, but be careful because both the Monsoon cover on the Pro Stock and the Reactor cover on the SS help that mild core approximate the power of the X's asymmetric core.
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Bowling: Wish I could help me as much as I seem to help others ...
Life ... is what you make of it. No, really!