Can you tell they're brothers?

I normally don't think that Owen and Silas look that much alike. However, there are a few pictures I have taken of Silas lately that have reminded me an awful lot of old ones I have of Owen. I'll show you a couple so you can judge for yourself. Silas is on the left, Owen on the right:


I think their expressions, specifically in the mouth, look similar here:







And I am going to venture to say that if you didn't know them, you might think they are the same baby here:




What do you think?