It all depends on your seed source. Non are really habs but people like to call brown Chinenses: brown habs, black habs, or chocolate habs even when there is no hab shape, flavor, or proper origin. I grew out a lot of different black/brown/choc "habs" and most were very similar if not the same. My guess is that they(at least most) originated in the Caribbean and have fairly recently become popular worldwide because of the internet. The problem is that it is now getting harder and harder to find authentic landrace varieties and we rely more on more on hobbiest to keep strains pure and labelled correctly which usually does not work out well these days.