Compare the specs of the Roto Grip Optimum Idol Pearl and Roto Grip X-Cell side by side in the ball comparison table below. To view the full bowling ball review for one of these balls, click the ball name link in the table below.
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| Brand | Roto Grip | Roto Grip |
| Ball Name | Optimum Idol Pearl | X-Cell |
| Cover Name | MicroTrax Pearl Reactive | eTrax ULTRA Solid Reactive |
| Cover Type | Reactive Pearl | Reactive Solid |
| Box Finish | Reacta Gloss | 2000 Abralon |
| Color | Bubblegum / Iris | Turquoise / Navy / Black |
| Core Name | Ikon + AI | Nucleus + AI |
| Core Type | Symmetrical | Asymmetrical |
| RG | 2.47 | 2.50 |
| Total Diff. | 0.056 | 0.056 |
| Int. Diff. | 0.000 | 0.019 |
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