OK, so Hexatraction, Van der Waal (not the effect), Rs, wax mat, etc. are all vinyl sheets with a silicon 'traction' surface. These are no different than non-slip products for tubs etc. They've been around for a long time. They are non-slip but not particularly grippy, they grip with force, but if you are light on the force, they slip. You need to keep them clean as they become slippery with oils from you hands, feet, sunscreen, etc.
Another somewhat similar product is a type of wax mat designed to assist in building a nice wax pattern with actual wax.These have built in raise patterns that you wax like a normal board.
Viskus and some other similar products. These again are vinyl back sheet with a splatter of polyurethane adhesive. They use a texture gun and use solvents to reduce the viscosity of polyurethane adhesive then spray it on the vinyl. Some like it some don't. Kind of costly at $16 for a disposable product. Most still add sticky wax to these.
Good quality
EVA is generally grippy enough for most, however, many like to add some sticky wax to their eva to assist in grip. Like all products, EVA will get more slippery with time from oils, so a little soap wash can help after a season or so. If you add wax to EVA it will eventually lessen the adhesives backings ability to stick and of course the wax will pick up all the fibers and dirt in the environment.
Nick