Boy....I just don't know. Any argument is kind of splitting hairs, but Jordan's incredible will to succeed separates himself from everyone else, IMO. It's impossible to do or decipher, but swap in your mind Lebron and Jordan. Do the Bulls win six championships (without a loss) with Lebron instead of Jordan? Do you see Michael Jordan about to go 3-4 in the NBA Finals if you put him in Lebron's situation(s)?
For the record, I'm not a Jordan guy and I like Lebron....but I feel the Bulls don't win six championships and I don't feel like Jordan would have a losing record in the NBA finals.
It's definitely splitting hairs. I tend to subscribe to the argument that the NBA was much more watered down when Jordan was winning his titles, the NBA had just completed its biggest expansion ever (it had enough great players for 24 teams, but now there was 30 teams) Also, the 90's was an era in which there was no rookie scale, meaning a lot of big time players flamed out very early in the 90's due to seeing way too many dollars way too early.
I believe there is no winner in this argument and never will be. I only side with Lebron due to the fact that I've watched him since he was in middle school, I only got to see MJ after his baseball sabbatical.
MJ beats Lebron in a game of 1-on-1.
5 Lebrons beat 5 MJ's in a game of 5-on-5.
I believe that's the best way to look at it.