Nah I think Kobe is better, lets just look at the history...
Lebron was eliminated last year in 6 games by Orlando, a team the Lakers took care in 5 games with 2 of them being blowouts
Lebron was eliminated this year in 6 games by Boston. Now granted Boston showed themselves to be a great team by nearly beating the Lakers so you can argue that they are at the level of the Lakers talent. And granted Lebron didn't have a really solid 2nd guy. But it wasn't like his supporting case was terrible, they had Shaq, Mo Williams, and Jamison with Iguasakas and the other tall guy coming off the bench. But despite that they got eliminated and in games 2 and 5 they were blownout at home!!! They could have got blownout in game 1 if it wasn't for the comeback.
Contrast that with 2008 were Kobe actually supporting case wasn't as good, Gasol was still adjusting, Lamar had minor injuries and they played a young Celtics team (and eliminated an experienced Spurs team in the semifinals), he took Boston to 6 games and didn't get blownout at home. I think he did a better job than Lebron did with his cast.