Ebonite just got back with me appearantly it is the same core...
Hi Tim:
It's the coverstock a departure from the controlled flavor that Ebonite has had in the recent past, the Flexol Reactive produces more length through the front and a strong backend. Though this ball is being released with 4000 grit, it can be polished or sanded to increase either the roll or the kick.
Sincerely,
Richard Jacobson
Ebonite Tech Support