The Sith are FAR more powerful than the Jedi. It is just that in life, the lesson has to be that good will eventually triumph over evil. Let's say that they ended the star wars movies at The Empire Strikes Back. Then evil would triumph and there would just be a bunch of angry fans. The Sith truly should be stronger but that will never happen. And, Bioware has gone crazy trying to even them out, but in PvP the Republic always seems to win, no matter the abilities thay have already attained or ahven't attained.