If not, then which character's mask or headgear has a more unique design?
I seriously think Spidey's mask is, no hyperbole, truly the most distinctive mask design of all time for a comic book character.
You can't mistake it for another character's design. And unlike with Spider-Man's mask, there's things you basically can't do with any other character's mask or headgear and still have them come out 100% recognizable, especially in terms of how the design can be applied to merchandise.
For example:
https://rockyparenting.files.wordpre...02/photo-9.jpg
or...
c44mEi7.jpg