Actually I think SF would be bigger than you by quite a bit when he's dieted down. Judging by those last pics of him in the toga, or whatever, he's got a lot of mass under that layer of fat.
And when you are super lean, your muscles look bigger -- but many, many times aren't. For example, tiny dorks like buttsuck or TA look all huge with their shirts of, flexing, and good lighting. Stand them next to SF, fully clothed, and no one would even see them cuz they're so damm small and insignificant.
So, say you got up to 20%bf like SF -- you'd still be tiny next to him if he remained at his current bf%.