There are several kinds I've tasted and others I've just heard of... In Texas, barbecue is mainly beef and tomato based, with sweet or hot varieties. Vinegar based pork seems to reign here in the South. I've heard of mustard based barbecue but I've never tasted it. Some people talk about molasses based barbecue but the stuff I've seen is usually Tomato based with molasses in it. I also found this link to be humorous....