This actually ties in pretty well to a rant I have, so brace yourself:
So, as far as actual sexy-time Sub/Dom, I think Yuri and Victor are probably both. You can’t really define them that way. That’s not how sex works. However, the label Sub/Dom is also a personality-related thing. In that sense, Yuri is definitely Dom. Victor literally worships him, especially when he’s in his Eros mode, and it’s fucking adorable. To everyone saying Yuri is Sub, ARE YOU FUCKING BLIND?! Not to be harsh, but there is so much evidence in the show that Yuri would be Dom. Without a doubt. No question about it.
Just take a second and think about it. I will admit that personality-wise, Yuri may have been Sub-ish towards the beginning of the show, but there is no way in hell that he is now. It’s also really obvious if you listen closely to his inner monologues during his skating. He’s not nervous and scared anymore, he’s aggressive and strong. Our shy little cinnamon roll has transformed into a confident sinnamon roll. Character Development™ at its finest.