Seismic Photon and Seismic Torpedo are very predictable balls and compliment each other well, as the Photon is a pearl and Torpedo a solid. One of Seismic Bowling's top qualities to me is the predictable motions the balls make. They don't over pride themselves on being huge hockey stick balls just smooth and predictable. From big hooking hard arching motion in the Equalizer to more down the boards with controlled hook in the Photons.