The thing that gets me is that there are people who believe dealers lace grass with coke.This would not only be a waste of the coke, it is also not realistic , coke costs about £50/$75 a grm and grass in my area at least is about £3/$4.50 a grm what would be the sense???

Its an urban myth.

I can only point out as others have that WW and PH are just different hybrids. .