I thought armin looked great and placed well... but it looks like he only had the same back thickness as silvio, which isn't good since silvio is that much shorter.... At least that is what I thought. I think he needs to build a bit on his chest, and more on his back, then winning isn't a problem.
I think that a problem with silvio is that his legs are too big... but then they make other guys like armin's legs look only mediocre.