Size at hatch isn't near as accurate as a size difference in 2-3 weeks.It may not be that noticeable in this photo, but the one on the right is nearly twice as big as the one on the left, the snood is also evident, he walks taller and with more purpose, We believe this one is a Jake, first to hatch and hasn't had to "follow" the chicks to food and water, he attacks the water like its his enemy lol...