Whether you like it or not, Astroboy has better voice acting, characterization, writing and doesn't pander to teens with anachronistic music. Above anything else, it succeeds at offering a pleasant time at the movies, which AE doesn't. You know why ? Because AE is boring to watch, has no real emotions and none of the human characters connect with the audience.
Of course, none of that matters to you. All you need in an animation movie for it to be good is "muh 2D" and "muh maturity, violence and blood".