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.
“Every sect is a moral check on its neighbour. Competition is as wholesome in religion as in commerce.”
“Guessing what the pitcher is going to throw is 80% of being a successful hitter. The other 20% is just execution.”