I have both Ebonite's and Track's bowling equipment and I really don't see any difference in the way they react on the lane. I have for Ebonite: a TNV, Angular One, Infinite One, The One, Crossfire. And for Track I have a full arsenal of: Robo Rule, Mean Machine, Power Machine, Machine, Equation, Solution Power Plus Ex, Desert Heat, and flaming T spare ball (just for the fun of it...I use a Columbia Blue dot most of the time.) As I said, I don't see where one brand is "rollier" than the other. They are all good bowling balls and work well. The Ebonite's I haven't used as much as I have my trusty Track's. They are more for the future..next season. As far as movement is concerned....they are pretty comparable across the board.
Chuck