One thing I remember; in a group session, one of the counselors (in recovery) said it was much tougher for him to quit pot than alcohol.
it was much harder for me too - with alcohol the damage is evident even to a fool...but pot gets talked up on how it's not as harmful as other things, it's natural, hey, it's even beneficial for medical use...
For me, though, although pot was more subtle in its destruction, it was just as disastrous as my alcohol addiction, even more so I think, cos I was reluctant to accept it as a problem.