Here's what Ebonite/Hammer Regional Sales Mananger John Gaines about Cut-Throat coverstock:

"Cut-Throat is a particle pearl. It is a light load though. Too much load (amount) of particle will cause the ball to hook early and bog down in the backend. Plus you have to take into consideration the differential of a core. The higher the dif the less of a load you would want to use. The Real Deal and new Big Deal are both on the higher end of the dif scale, therefore a lighter load of particle. The reactive material in both balls is a strong reactive however."

Also, the higher differential you may see on bowlingballreviews.com for the overseas Black Real Deal is the 15lb. ball Differenetial and Rg. Besides color, it's the same ball.