I wouldn't say one is easier or more difficult, but when you're inside a costume and a mask, you have to endure heat - and, often, difficulty seeing. The vision is not very good in a mask. And you have to cope with that, as well as trying to think about this character.
“Together, we can create a world in which peace is real; in which every human being can thrive; in which all share the promise of our century. I believe we can succeed.”
“Real courage is when you know you're licked before you begin, but you begin anyway and see it through no matter what.”