Those two balls are on opposite ends of the spectrum as far as reaction shape goes from a particle standpoint.
The core shape in the two provides a large difference in length and amount of hook. The terminator is a much earlier rolling ball, and the higher particle load in the terminator will provide the traction in oil.
The sting looks to me to be a very angular particle ball. No, its not as angular as a reactive resin ball but for a particle cover, the ball comes off the corner pretty hard. From what I have seen, I think the sting would be closest to the shape of a Black Pearl, but not as much overall hook.
And as with anything, grey pad will make the ball roll sooner, and smoother. Keep the polish, more snap.