Saddle feathers on properly colored Lights. Males of that age would have black saddles laced with white, while females would be solid white. Also females tend to feather more quickly in the saddle region. Saddle feathers on a male would be more pointed as females would be more rounded. Its difficult to determine anything by color on these birds, there is a lot of black where it is supposed to be white.(assuming they are in fact Lights) If they were Darks,it would be obvious by two months as the sexes are colored so differently. My gut says top photo K, bottom P, but that is pure speculation on my part. (a guess)
Tim
Tim