Realism v. Comedia

Realism has proven thus far to be descently difficult. It is difficult in the way that you need to know your character in a very deep way. You need to know him "through & through". It seems as though the only way you would actually perfect the personality and emotions of you character, is to be you character. Even as this person, you have to know the other character rather well; to know how he will respond to your words. This brings up the comparison to Comedia. Not in the fact of knowing the character, but the diffuculty of becoming the person. In realism, it's all about the research, and what you can find about that individual. In Comedia, it seems to be all about the repitition. You learn the movements and actions of the character, then perfect them . . . physically. You need to have the right body movements and bodily reactions to each situation. What's your views to this comparison? Which (realism or comedia) would you say is harder for you to master? Which do you like more?