Looks like a satin silkie to me. Silkie x bantam cochin. Silkies are themselves usually bearded. I think it just stands out more because she is smooth feathered.
I think the hatcheries are breeding blue laced to splash laced, and that's why it's difficult to distinguish between the two, because all of the birds have lacing that is fairly pale.
A darker blue is usually preferred for other breeds, and that is created by crossing black to blue. But with...
Most of these look like mixes of mixes. I think most have Wyandotte genes, due to the faint lacing and some having rose combs. Several are barred, so probably a barred rock in the mix for some, too. There is an all red hen who probably has Rhode Island red in her mix. The last one does too, and...
It's looking like a cockerel to me, but the comb isn't so big that I would say it is definite. Keep a watch on the comb and wattles for growth and color in the next few weeks. If there aren't rapid changes during that time period then you have a pullet.
I wasn't sure if it was the same genetic mutation in both breeds, but I'm reading that it is. So that would make it a recessive gene in Hedemoras just like with Silkies.
The only problem I can see is that this breed is so rare. If you can find a seller who will guarantee silkie feathered...
3 is a definite cockerel. The rest are pullets.
5 must've had Silkie or Hedemora in its mix because it is silkie feathered. The Silkie gene is recessive, so the parents don't have to be Silkied themselves to pass it on, but both parents must carry the gene for it to happen.
It depends where they are from. If from a hatchery or store, it should be purebred even if not quite up to the standard. If it is from a backyard breeder then yes, it could well be a mix.
Is it a male? Probably, with that amount of black in the plumage. But not definitely. I would give it time.
My hunch is that both are pullets. Males tend to get large patches of solid color on their shoulders-- but not always. Females should have even lacing on the shoulders, although they, too, can show small patches.
It's impossible to know whether those birds are fibro or whether they have lightly feathered legs. I think it is more likely they were derived from Slikies than Hedemora. But it seems to be a variety that is long gone.
If I was trying to create what you are talking about, I would start with...
I see some bits of white on the wings and some funky feathers coming in on the upper back. Those things combined with the large comb and wattles are white I think it is male. I think within a few weeks it should be clear one way or the other.