Originally posted by pete
the question says equal skill, but does not indicate the level of skill. if they are both at a relatively inexperienced level of skill, the larger stronger opponent may have an advantage, however may also be slower thus, at a disadvantage.
at more advanced levels, its a draw, because while the larger opponent can apply greater force, the smaller opponent is trained to relax, yield, and transfer that force right back in return. But... the larger opponent is also advanced, and would know what the smaller one would do, therefore would refrain from using brute force. Skill becomes the great equalizer.