Luka < LeBron. It is not close.
For one thing, half the game is defense. Young LeBron was a menace when he wanted to be. Doncic is okay as a defender. This isn’t captured in your stats. Also, Doncic has been a pro for years. LBJ was up from playing against high schoolers.
Ultimately, I project Doncic as a very good player - all star with top-5 potential. Harden seems like a better comp for his ceiling.