Thats an interesting question. I would think that since you are combusting, your getting smoke, and if your getting smoke, your getting a lot of the toxins. I'd think that vaping would be better. Probably also depends on the type of hash.
go ahead and ship me some of this hash and ill smoke some and let you know how BAD it is for you. actually lets not take any chances you better send me a bunch so i can be sure.