Arguing about Batman versus Superman is like masturbation: A lot of people do it online, often instead of sex, and it's a lot of fun. Also like many arguments online, one side is backed up by intelligence and careful preparation while the other only keeps going because arguments just bounce off its stupid invulnerable skin.
Even Superman looks bored by his own comic.
7Batman's Regular Stories Are Interesting
Superman is the icon, the original comic book superhero as we now understand the term, and 80 years later he's still kicking ass. But like many 80-year-old men, he repeats his stories too often. He's practically a mythological figure, but mythological figures are only interesting in epic confrontations. Zeus doing battle with the Titans is world-shaking. Superman facing the Prankster is about as interesting as Superman facing the mirror, super-flossing his super-teeth.
Yep, that's a weedy strip of organic matter he could get rid of by spitting hard. The Prankster's greatest crime was theft of the reader's time.
These monthly non-entity villains are the super-equivalent of rain on your way to work: It's never going to stop you, it just makes this regular chore slightly more annoying as you proceed in a straight line to the inevitable conclusion. Superman could solve most of his problems by flying toward the bad guy and then nothing else.
Helpfully demonstrated by the Authority's Apollo.
Not killing people is an important part of Superman's character, but there's a huge gap between "a moral code against murder" and "letting any idiot who can afford fancy dress waste four months of everyone's lives." Batman's insistence on the same code is much more impressive because he's actually risking himself for it. And Batman's everyday confrontations are still interesting. You know he's going to win, but he always has multiple methods, none of which are "Just be immune at them until they die of old age." He can turn one thug with a gun into one of the coolest takedowns of all time.
Batman disarming the good guy instead of the murderer, just to keep things interesting.
This is why Batman has brilliant video games and Superman doesn't. In the Arkham titles, Batman is far superior to his enemies, but will still be shot to death the second he screws up. That's what makes victory fun. Superman games are all annoying because he has to be ridiculously weakened, because challenge is impossible when you're a walking God Mode.
Making Superman magically depowered and forced to fly through hoops to get to the end, Superman 64 was mocked, but is actually based on 90 percent of all Superman plots.
A true Superman game would have an immortal main character racing against time to save innocent civilians with unavoidable consequences -- meaning it would be the worst game ever, based on time limits, escort missions and permanent failures.
6Batman Gets to Be Himself
That title might sound odd when you're talking about a man with a secret identity dressed up as a giant latex rodent, but Batman has never been exposed to anti-vengeance-ite. Because Batman writers don't have to fight their own main character to write a story. Superman is only barely short of flying out of the page and punching the author for daring to inconvenience him. Powers are meant to define a hero, but Superman suffers superpowers like rising damp: They start out manageable but keep climbing until you have to tear the whole thing down and start again.
Sometimes with tragic results, like Roller Disco Superman.
Super ventriloquism, logo-throwing, existential micro-self projection -- no one has been given more ridiculous powers in fewer lines of writing since Mussolini. Which is why Superman has been affected by more chemicals and forces than hydrogen. Magic, hypnosis, an entire anti-rainbow of Kryptonite that made him suck ("anti" because regular rainbows are linked to strong men sucking in a good way), and whenever things get too troublesome they just block out the sun.
Which finally makes their capes useful, and adds yet another reason it sucks to be a female superhero.
Depowering Superman is meant to make us appreciate his inner resolve and true heroism, but actually makes us endure the non-adventures of Man-man. If he's not Super, we could be following any idiot, and seeing him running away is even worse than watching him effortlessly punch his millionth giant robot. One of the worst examples was Aliens vs. Superman. A Kryptonian finally teaching those literal-dickhead xenomorphs that attacking strangers in space is a bad idea would have been awesome, but instead he's depowered and spends four issues running away so hard that an entire world dies.