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.
It used to be that you could do these nuggets of a movie and it would attach itself in terms of credibility to your work and the style of work that you did, that people would be interested and curious about you and your work as an actor.