Sometimes they just do different things.. Like any plant if you plant 20 apple tree seeds from the same tree. Although the trees maybe very close together far away.... in the big picture one will grow much faster one will the be the slow glower, one fruit may produce better tasting fruit. One seed may not even grow at all. It's genetics and it's like preprogrammed lol :). Some times the short little plant produces the sweetest fruit even if it has the hardest time growing.