Hen with barring gene, rooster without, will the white spot mean anything?

[Airyaman]

So in two different threads I mention that I got two mystery chicks hatched from a batch of what was supposed to be Bielefelders. The eggs were all roughly the same size, so my assumption is that the hen is a Bielefelder (barring gene) and somehow a Silkie or d'Uccle rooster (the only other breeds the seller claims to have) did the deed on one or more of the hens.

Now, both chicks have a white spot on the back of the head, but one is huge and the other is pretty small. Would you say this helps at all with sexing or is it a total crapshoot at this point? Here is the difference in head spots:

And I have confirmed the dad is one of the two because the one with the smallest white spots has feathering on the legs.

Thanks!

 

[Nicks_Chicks]

I would say that the are sex linked. Those are both boys

 

[Airyaman]

I would say that the are sex linked. Those are both boys

Yeah, think so.

https://www.backyardchickens.com/ar...rs-what-they-are-and-how-to-breed-them.65934/

Weird thing though, those photos were from yesterday and white spot on the one is actually smaller today. Weird.