Spielberg is the most overrated director in the history of the medium, a favorer of lowest common denominator emotional pandering over real drama and characterization. He has a great mind for capturing a sort of childlike perspective on things, which is what makes his best work (Jaws, Close Encounters, Raiders) so good, and a mind that is great at designing setpieces and "moments", which is why something like the opening to Saving Private Ryan, or the opening to "Schindler's List" where Schindler woos the Nazis while barely even appearing on camera. And his cinematography in his most productive era (1970s-1990s) is largely quite good, as he has a real eye. But for every good quality or moment, there are 10-20 moments of shallow, cliche-ridden saccharine, poorly-written and -acted crap.
So no, it's not particularly close. Scorsese's movies in the past decade have been vastly overrated and would not have attracted much attention without his name on them, but his best work (Mean Streets, Raging Bull, Taxi Driver, After Hours, King of Comedy, Goodfellas, Casino, and a few more) is some of the best-wrought, deepest cinematic artistry one can find, particularly in America.