Alright, so you cannot tell the difference from the size, but surely there are unique strates for instance, a white widow's seeds being slighty pale or "white". which would then be thrown under the title seeds are pale or white, along with (im sure) many other strain. so tellnig the strane by the seed won't exactly pinpoint the genetics, but it will dwindle the possibilities and thus making easyier to use other traites such as: taste, smell and color to determine the genetics closer to the correct species... sorry about the grammar, imma little faked up now.. love you all,
Sof