Ok, there's a brief description about the ball and I'm trying to under this statement:
The 505A, which is the companion to the 715A, features the same MP GEN3 coverstock as the 505C, but with a pearl additive that gives the 2000 grit Abralon polished ball more length.
“The 2000 grit gives the ball more of a grip on the lane while the pearl additive keeps it from gripping the lane as much ball with this surface would normally,†Kosby said. “We’ve balanced it using opposites.â€
So if this ball is already a pearl with the coverstock of the 505C how does it have "performance pearl additive"? Or am I missing something here?