Dymondwood is a dyed resin impregnated laminate that is basically 40-50% plastic and it totally waterproof and very strong.
Spectraply is a basic laminate made of dyed wood (birch). It is not resin impregnated a N thus fairly strong but will absorb and retain moisture.
Dymalux is a bad imataion of dymondwood that has a very low strength factor do to being brittal but it does make a good striker.
Webwood I have no experience with.