Take all this for what it's worth.
I am a tweener and own both balls. At Nationals I was more effective at playing in deeper with the Vertigo with the Out of Box finish. The guy at the Roto-Grip booth told me to take some of the polish off the RSX, and I would be able to move in deeper, but I didn't try it.
The Vertigo is Assymetrical as well, so you could probably get a sharper break point with it. The Vertigo moves a little earlier.
Not to say that the RSX isn't one of my favorites, but I think the Vertigo is more aggressive at reading the midlane out of the box. The RSX gave me more backend out of the box.
I don't totally recall what drilling I used for the Vertigo, but I think that I put the pin at 4", the MB in the strong position, (just right of thumb). CG just a smidge over the midline. My RSX was Pin at 3 3/8", with CG about 1.5" right from Grip center. Both balls had 3-4" pins.
Hope that helps.