Well, I already assumed that the black lamb is of higher quality--given its reputation. My question was more about why that might or would be the case. My (naive) impression is that leather varies depending on the individual body it came from, but the dye is something added later. Hence, it shouldn't affect the substantiality of the leather much. However, I'm told that the black leather here is superior to the other colors--and I'm wondering how that happens.