Is VectorNet and S-2 fiberglass a strong combination?
VectorNET is a stiffener and not so much an impact resistant material. It will make your board lighter, stiffer, and break-resistant but not ding proof. It will help resist pressure dings from feet and knees if used on the deck.
S-glass is more impact resistant than E-glass and a bit stiffer.
With Vectornet on the foam and a layer of S-glass on a poly blank you pretty much have a very strong board in many aspects with a savings in weight.