It depends on the specific fanfiction. In some stories, Superior Iron Man might be more powerful because he's willing to push the limits of his technology and his morals further. But in others, Iron Man could be more powerful due to his experience and his ability to work well with others.
Thanos could also win in a fanfiction. He has incredible strength and the power of the Infinity Stones at his disposal. In a lot of fanfictions, the power levels are often exaggerated. Thanos could simply use the Reality Stone to make Iron Man's weapons ineffective or use the Time Stone to freeze Iron Man in time and then defeat him. His brute strength alone is enough to overpower Iron Man in a direct confrontation. And his experience in battles across the universe gives him an advantage over Iron Man who mainly operates on Earth.
In some fanfictions, they might team up against a common enemy that requires both their unique skills. For example, a new super - villain who has the ability to hack into Iron Man's technology and also has super - strength that Spider - Man has to counter with his acrobatic fighting style. They would have to learn to work together, with Iron Man respecting Spider - Man's instincts and Spider - Man learning to trust Iron Man's strategic plans.
In some fanfictions, the winner isn't really about who is more powerful physically or technologically. It could be about who has the stronger will or the better moral compass. For example, if Iron Man realizes that he's in the wrong during the fight, he might back down, making Spider - Man the 'winner' in a sense. Or if Spider - Man is able to convince Iron Man of a greater good, the fight could end without a clear physical victor.
A great way to write a compelling Vulture in fanfiction is to base his actions on his backstory. If he was once a bullied or overlooked individual, his actions as Vulture could be a way to prove himself. His dialogue should be sharp and to the point, showing his intelligence. When he interacts with Spider - Man, don't just make it a one - sided battle. Have them exchange taunts and threats that reveal more about both characters. And don't forget to make his appearance unique. His vulture - like features should be more than just for show; they should be part of his identity and how he approaches combat.
The differences between them are significant. Lex Luthor is more of a traditional villain in the short story. He is jealous of Superman mainly and wants to prove his superiority through his intelligence and inventions. His technology is sometimes more experimental and untested. Iron Man, however, is a hero who has refined his suit over time. His technology is reliable and battle - tested. In terms of character, Iron Man is more self - sacrificing. He is willing to put himself in danger to protect others. Lex Luthor is more concerned with his own status and power. Their methods of achieving their goals are also different. Iron Man uses his technology to directly combat threats, while Lex Luthor may use more underhanded means like manipulation and subterfuge.
Iron Man would probably win. He has a highly advanced suit with a plethora of weapons and defensive systems. His suit is constantly evolving and he has the genius of Tony Stark behind it. Metallo, while strong with his kryptonite - powered body, Iron Man could analyze his weaknesses and use his repulsors, missiles and other gadgets to take him down.
One interesting plot could be where Metallo somehow gets an upgrade that can disrupt Iron Man's technology. Then Iron Man has to rely on his wits and basic engineering skills to fight back. Another could be a scenario where Iron Man has to protect a city from Metallo without using his full - powered suit, making it a more challenging fight.
The Vulture in Spider - Man has his own origin story. In the comics, Adrian Toomes, the Vulture, was a former engineer. He developed a flight - suit with wings that allowed him to soar through the skies. His motivation often stemmed from a sense of being wronged in his business or scientific pursuits. He turned to a life of crime using his technological creation, which put him in direct conflict with Spider - Man who was trying to protect the city from such villains.
One interesting plot twist could be that Iron Man discovers a hidden power within his suit that can counter the Infinity Stones. Maybe it was something he unknowingly built into it long ago.