The secret agent and the virtual energy will be very different than one another because of the stronger cover of the energy and the asymmetrical core thats in the energy. I figure that the energy will be more similar to the gravity shift because they share the same weight block and coverstock base (with the difference being in the amount of pearl additive).
I would have to say that a hyroad at the same grit as the secret would be close because of the weaker hybrid shell and the symmetrical block. The second dimension with those large mica particles would also be a good choice as that coverstock additive seems to do the same type of thing as a hybrid shell (more roll than a pearl, but more angular than a solid).
They don't really see anything in the current lineup that translates exactly to the gravity. Like I said before, the energy is probably the closest thing. If you were to get the energy and put the pin higher than it is on your gravity, it should speed the transition time enough to offer a relatively close approximation.
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