Umm...I don't know if I'd say that. None of the Batman costumes in the movies have been very faithful to the comics. TDK being the biggest offender out of that group. Superman Returns has an almost universally despised Costume, Catwoman certainly wasn't the best of costumes, and Watchmen...well, they weren't bad, but there were quite a few around here who weren't very happy that they upped the "cool" factor on the costumes and didn't stick to the campy parodied nature of them.
Really, the only movies with DC that I can think about that have had true accurate costumes were the early Superman films. Other then that, I would say Marvel beats DC in terms of costumes.
Both Hulk films looked like Hulk, Spider-man and Iron Man were superb, and the costumes were the only good thing in Ghost Rider and Fantastic Four. Daredevil really wasn't that bad either.
The X-men movies were the only ones that were wayyy off base. But that's never bothered me that much, because none of them have had set costumes, they've changed countless times over the years. Yes, they were always more colorful then what we got in the movies, but the point being, they never had a set iconic costume that had remained consistent through the years.
So really, Marvel's been pretty good on Costumes. Cap's isn't great, no. But again, I honestly have just never been a fan of Cap's costume. I can understand why they're gun-shy of it. It's pretty gaudy looking. But again, I've just never been a fan of overly bright costumes. I liked the Symbiote costume more then the classic Spidey suit for a while, and I've never been a fan of the powder-blue Batman. Just personal preference I suppose.