2 x Sensi Seeds Amnesia XXL Automatic

At the beginning of week 11 they both look strong and healthy to me. Though their buds still seem smaller than the one in the 20l pot. But the look great after all :) So colorful and frosty (the smaller one) and so big and yellow (the taller one). Can't wait to harvest them :D At the middle of week 11 they both still look great and I think I saw the tall one's buds grow a bit again... There was something strange going on at the top of the head bud (of the taller one). There'S a close up picture... I guess it's just a kind of mutation and no seed. I was shocked first when I thought it was a seed...