You say that as if I'm the only one who read things wrong. You clearly read wrong your self.
"This was made with a huge assumption". That opening statement makes the whole calculation an opinion, a really good educated opinion, but we can't be sure. But that's besides the point... We have no idea how much force Cap is putting behind the scan that is shown, so how can you say Ryu is stronger? You can't, unless from the scan at the distance Cap is shown with the boulder, you can estimate how much the boulder weighs and how much force he is putting behind it. That's my point.
Be patient. I'll show some scans. It'll probably have to be in a couple of hours due entertaining some guests, but this site isn't disappearing.