Define "a drink or two".
Personally, I've seen alcohol addiction in both forms and I am rather sure that the labels "worse" and "better" should not be attributed. There might be more immediate effects with heavy drinking, but you have to consider the danger potential for those other forms of addiction as well.
Social drinking is a b****. And I state this from a rather unusual perspective, as I haven't been drinking any alcohol for 17 years now (yes, none at all). And whenever I'm in a new crowd and have to make clear that I just plain don't, it doesn't matter much if these people are open minded/tolerant/reasonably or not, I can feel the disappointment. It's as if you said: "You're nice people, but I don't really want to have anything to do with you". Feels weird every time.