I'm going to wait until there's ~5 posts/votes before I tell my pick. Chose which you think is better (objective) or better (subjective) and please explain below.
Whatever Happened to the Man of Tomorrow? is "the last Superman story told". Ending the Pre-crisis continuity, rumor has it that upon hearing the news of the plans for Superman following Crisis on Infinite Earths a bushy bearded Alan Moore stormed into a terrified Julie Schwartz's office demanding to be the one to have the opportunity to write the "end."
For the Man Who Has Everything doesn't have such a story attached to it. Instead it's a really great, solid pre-crisis Superman story. It does however have the distinction of having been adapted into a Justice League Unlimited episode of the same name.
Whatever Happened to the Man of Tomorrow? is "the last Superman story told". Ending the Pre-crisis continuity, rumor has it that upon hearing the news of the plans for Superman following Crisis on Infinite Earths a bushy bearded Alan Moore stormed into a terrified Julie Schwartz's office demanding to be the one to have the opportunity to write the "end."
For the Man Who Has Everything doesn't have such a story attached to it. Instead it's a really great, solid pre-crisis Superman story. It does however have the distinction of having been adapted into a Justice League Unlimited episode of the same name.