I'm not particularly a fan of "king" james as i believe often he's guilty of gross travelling that just seems to go unnoticed by nba officials but i have to say that i believe he will be able to put up similar scoring numbers to MJ. Hes just reeled off 3 games of 41 pts in a row and often explodes for 50 plus points.
Saying that jordan had 9 games in a row at 40 + points one season (87 or 88) i think and was dropping 60+ like it was no ones business but thats when the bulls were literally a one man show.
Offensively mj is unmatched in terms of jump shots, dunks, and a repetoire of great post up moves. His all round offense is non pareil - kobe is closest to anything that resembles MJ. Lebron is too much slash and dunk offense but may develop his jumper later on as did MJ and Kobe.
What goes unnoticed about Lebron that often gets overshadowed by the points he throws up is his all round game - he's averaging 8 rebounds and 6.5 assists so far this season which is oscar robertson esque.
As for that dunk in particular, clyde drexler did a similar one in his rookie year against the lakers. Clyde seems to hang more and be higher as he bends his legs back.