They both look non bearded to me. And I would guess pullets. My white has a comb and wattle at 12 weeks and my partridge has no showing of either so I feel petty sure it is a pullet. Are either of your whites showing any type of comb or wattle? Couldn't really tell by the pictures. But good looking Silkies!
Hens go broody when you don’t want them to… and won’t go broody when you do. 