Yes, rooster. My pair of 8 week old buff silkies are begining to look very different as well. Your roo looks just like mine! If I can find my camera I will post a picture of my little buff roo next to the hen.
Have 11 of the silkies and they are too cute but I can tell males and females Already I think. I believe I have 3 roos and 8 hens. Not a bad turn out. I will get pics of everyone very soon.