White silkie expectation vs reality

On the left, Jagger. My sweet little fluffy lovebug cat. Very soft, very mellow. Wanted him in chicken form.

On the right, JJ, or Jagger Junior. Chaos Goblin. Was not expecting such a wild curly feather pattern, she might be a woolie. But very chaotic, very anxious. Hides in my sons arm but ultimately hates being picked up. But in these pictures they look like brother and sister, right?