Had an Octane Carbon, until it cracked. I still throw the Venom Shock, Venom Cobra and Venom Shock Pearl.
Venom Shock is earlier and probably 4 boards or more stronger overall. I don't see much difference in the VS Pearl than I did with the Octane Carbon, but it's been a few months since I threw a Carbon.
If you already have the Carbon, get the Venom Shock(original), I think the VS Pearl occupies the same slot in your bag as the Octane Carbon.