Cork is not transparent, that was the whole idea.
Even Spacestick's are only semi transparent (got some myself), whereas Hexa Traction RSPro
(I think the OP mean, when writing HexaGrip) is clear.
SpaceStick are thicker and softer, and better grip, but not clear.
And very few boards are all white nowadays...
Hexa Traction is awesome for foiling, have use a set more than two years now on a hydrofoil strapless, and eventhough I got spare ones to use when worn, they are not slippery yet, and not one single one has de-attached or anything.
But it is not as grippy as a normal deck, so for other boards than foiling, it might not be sufficient grip for everyone
I like them, deck art fully visible
Van der Waal should be even more grippy, and clear, and cost a bit less, some say, but havent tried them myself.