If you consider the intent regarding the use of both, smoke a blunt and your intention is to get blasted, in fact the higher the better, that is usually the objective.
With alcohol, however, you have to choose to get wasted, which when comparing the degree of intoxication, weed is probably the prefered high, no having to do the stick your head in the toilet thing, but its kinda' like cheating. Your allowed to get the greatest intensity of intoxication with the least ammount of visible short term damage to the body. Alcohol intoxication has to be metered out, often in large quantity to produce the same type of high sought when smokin' a spliff.
Right there is one of the greatest differences, you have to choose to get as high with alcohol, where with weed, unless your smokin' some bad $#!+, that high is the only objective but if your smokin' some really, really good $#!+, its usually the only outcome.
The only other problem regarding smokin' a spliff comes from the almost insane damage that comes from ingesting such a thing, smoke at such an intense degree of heat, 100's of btu's, who knows, holding that smoke as long as you can, having your bodies natural inclination to expel that kind of energy refused, while you vainly attempt to not cough your brains out, to me just doesn't have the same appeal any longer.
Alcohol, however, is a much more reasonable response to an irrational solution, that being the need to take the edge off of the problems we face in this struggle here.
1st Timothy 5:23
Though there are more scriptural pronouncements against drinking then there are that favor it, there are a select few that actually support it as above. There are, however no scriptural support for the blatant abuse that comes from improper and illicit use of drugs.