I agree.
I think that's a good guess. SFH have pretty varying characteristics and some are crested. Meyer does sell them and I can't come up with anything else they have that fits.
Polish are supposed to have white skin not yellow. I think the crested ones are some sort of really cute mixed breed or possibly just a breed that I'm not familiar with. The red is probably a production red. The other is a light brown leghorn. A welsummer would have red earlobes and yours has...