give a reason why you think it
In a far future i think suit of armor will eventually be realistic than gadget ( i mean, why need gadget when you have reach the age of nano tech with multiple use and such)
But for now, gadget is more realistic, a suit of armor that cost billions just for one man is too much.
Gotta go with neither.
A person would still be killed from whiplash or internal bleeding inside that suit of armor and no one could ever master every single martial arts style in the world and be the world's best detective and be able to invent all kinds of gadgets.
I think the fact that he has no powers and is supposed to be human makes Batman one of the most unrealistic characters in the comic universe.
Skill wise, Iron Man. Batman is just too good at everything to be real. Not only is he one of the smartest men alive he also mastered various types of science, criminal investigation, and EVERY single combat form known to humanity. And he did that all before he turned 30. Sure, Tony is a engineering genius, but he's not much without his suit.
If we take Batman just as a vigilante who dresses as a bat and we forgot that he has mastered 127 different martial arts and at the same time has a second life as the most famous man in Gotham - then yeah.But if we believe that Batman is all that then hell no - that ain't possible.
Batman. His motive and skill set just make are just a little bit more real. The Possibility of learning different fighting styles is more possible then anything like Ironman. Yeah we have the TALOS but nothing we have seen or heard says it can do half of What the Ironman Armor can do and IMO it seems more like a bullet Proof Batman suit.
Iron man. Simply because he is a master at engineering and tech, if he can build an arc reactor in a cave then the suit is no problem. I remember watching the bonus features on the watchmen movie and they said the grapple gun that Rorshach uses would need a gas canister on a backpack to launch a hook up a building, so Batmans gadgets must all be the same kind of infeasibility, as well as the time needed to master all of what Bats has mastered.
Batman, but I don't think his gadgets are as "realistic" as people think. ex: His 'automated' grappling hooks both being as powerful-&-yet-small as they are is highly unrealistic. Batman doesn't talk about (/we're not given a lot of detail on panel) his gadgets & how they work, but just the fact that he has some pretty amazing features that are also not-cumbersome (because he's still got to be all ninja-like), is pretty unrealistic. (At least with Ironman, he's got this bulky suit - so it's feasible he has various gadgets inside the big suit).