Marvel's Moon Knight is often seen as the company's answer to the perpetually-popular Batman, but the former's secret superpower means he is easily Bruce Wayne's better. The similarities are paramount, especially when one compares the backstory and techniques of both heroes: both use the shadows to their advantage, both have lives shaped by tragedy, and both suffer from various mental illnesses (largely depending on the writer). But Moon Knight actually has a superpower from which Batman would benefit immensely.
It's easy to see why many comic book readers call Moon Knight "Marvel's Batman." His fighting style is quite similar, using gadgets but mostly relying on his fists; he uses emotional manipulation to his advantage (he wants criminals to be afraid of him, just like Batman; he covers his face and wears a long flowing cape (though the same can be said about other heroes in both the Marvel and the DC Universe). Moon Knight, however, is far more violent than Batman, often approaching Frank Miller-esque levels of violent tendencies and tactics).
But Moon Knight has a supernatural power that Batman lacks entirely (part of the Dark Knight's appeal is his humanity in a world full of aliens, machines and monsters). On occasion, Moon Knight can catch glimpses of the future. However, these visions are often fed to him through his psychic connection to Khonshu (the real-life version of Khonsu, the Egyptian God of the moon who marked the passage of time).
Moon Knight's Superhuman Registration Act card says as much; Marc Spector can sometimes receive "prophetic visions." As a comic book hero who is famous in part for his ability to prepare for every encounter, Batman would perhaps envy this power most of all; the ability to see an enemy invasion before the enemy has even thought about invading would be invaluable to the Dark Knight. However, Bruce Wayne is also naturally suspicious of any and all mystical forces, and receiving visions from an Egyptian God would in all likelihood lead him to discount those otherworldly premonitions entirely.
It's worth noting that Batman's preparations have often led to trouble. Most notably, his contingency plans on his fellow Justice League members (which are frequently referenced in expanded universe material). Batman could thus do without all the fallout stemming from an acted-upon vision of the future, but Moon Knight (who is forced to see this visions via Khonshu) unfortunately has no choice in the matter.