Can't remember if I saw this thread before or not but now I need to see what I have missed.
I have one SF that is a bit over a year. She is light and small. Then I have a 15 week old pullet that is so much darker and has a darker beard (she is SO hard to get pics of since she runs from me. It is funny I had picked up extra chicks when I got mine this year in case I had any issues like last year with getting 2 roos or any not making it. So I got the SF as an "extra" didn't know if I would keep her or not. Then a girl I picked up some for got an SF and hers turned out to be a roo so I was going to give her my hen but then my daughter loved her coloring (she picked out the other SF last year too) so we ended up keeping her. I love how different they look!