psychodad,
The main differences in these 2 balls is the coverstock and the finish. The base Theory is intended for heavier oil because of the solid cover and the dull finish. The Infinite is intended for less (but still failry heavy oil) because of the solid/pearl combination cover and the highly polished finished.
The fairly strong core and a decently strong drilling should definitely help lower rev bowlers but almost of of greater significance, for drilling and surface purposes, is your ball speed, PLUS how much oil you're bowling on. As long as it's (true) medium or preferably slightly heavier oil, both Theorys can be used with the right surface. The solid would probably be better, as long as your ball speed is not less than medium speed. The slower the ball speed the more shine you'll need on the surface and the closer the Infinite might be to being the better choice. Because of all the factors involved, your personal driller might be the best person with whom to work out the details.
"None are so blind as those who will not see." "Some bowlers are crazy as pickled cats."
