Bird #1 is a Sizzle. Basically a Silkie with a different feather type, but the correct name is Sizzle. It's not Partridge, I wouldn't say its any specific color. Nothing is screaming cockerel.
Bird #2 is probably a Silkie mix. May have Partridge Silkie in it but the color is not Partridge. Mixed color. Looks like a pullet, it's flat feathered so if it isn't growing cockerel feathers within the next 3 weeks or so it's definitely a pullet.
Originally Posted by rcstanley
Why? (genuinely curious) Is it because the feathers for the male/female color patterns would not be grown in yet?
I know in general for silkies, 9 weeks is too young. My understanding was with partridge there were color patterns that were male and some that were female, so if you had one of those color patterns you would know gender.
That's basically correct. 9 weeks I wouldn't say is way too young for a flat feathered bird like your #2 pullet, but for Frizzles, Sizzles, and Silkies, it is - even for a real Partridge bird, patterns don't clear up until 15, 16 weeks at least, and they're still more muddled in Sizzles/Silkies than any other breed.