To me, it doesn't look like a speckled Sussex, but it doesn't look like a Legbar either. But I have no experience with the breeds. Of the two, though, I vote Legbar.
I think #2 is legbar. I have two that I got as three day chicks. They’re about 5-6 weeks now. Here are a few stages of growth. The one pic she’s front and center. Hard to tell though. Crazy that they’re so similar.