Looking at RG's site it has the same core, same core numbers, and a solid version of the same cover as the Illusion yes it can be confusing.
I emailed Roger questioning where it would fit since I own the original Illusion, using the same layout he suggested to scuff the shine off like some of these people already are.
That should make it fit nicely between both balls with little or no overlap.
--------------------
With every action, there comes consequence
Used to be known as Pin_Krusher or Divine_Dragon