It depends on what is "better"
In terms of overall just talent on the floor. He could be a far better regular season guy. He has the ability to guard every position on the floor, is a better passer, and if he improves his jumper can be a better scorer.
I never see lebron having those jordan legendary moments in the playoffs...at least with having two superstars backing him because it will be rare he'll get enough opportunities to do it. I also don't think he has the mindset for it.
If accolades are in to question he could surpass him on number of MVPS, titles, defensive player awards stuff of that nature.
Overall I never see lebron ever taking over the legend of jordan and to be honest the fact he changed his number means he doesn't want too in the first place.