there is absolutely no evidence for this but this is what i think...... they are both twins, but most importantly they are guys. if they are like normal guys they compete with one another, even more so because they are twins.from a guys perspective and a brother's, i would never bow to guy unless he was stronger then me and could whup my ass.
so my vote goes for sora being stronger.
"Our deepest fear is not that we are inadequate.
Our deepest fear is that we are powerful beyond measure.
It is our light, not our darkness that most frightens us.
We ask ourselves, Who am I to be brilliant,
gorgeous, talented, fabulous?"
Actually, who are you not to be?