Lebron is a great teammate who supports and includes everyone in the team and makes them better. Jordan on the other hand has quite some instances reported about himself, where he got into big fights, even physical ones (see Will Perdue).
Lebron is as complete of a player as you can get. He can shoot, pass, rebound, assist, block, steal the ball and defend every position. While Jordan was great, he never had that complete tool set to influence the game.
While Jordan never lost in the Finals, there were a lot of seasons where he didn't even make it to the Finals. LeBron has been to the Finals 5 years in a row, with two different teams.