Since the speaker compares himself to a night owl and Wilson to an early bird without the usage of the words "like" or "as", this is an example of metaphor. The reader is obviously not actually a night owl, but is merely saying that he's more active at night.
A comedy is suppose to be funny, full of jokes, and made to entertain people/audience, while a tragedy is basically something wrong that happened, like a death in the family, read these two examples I made carefully: Hey guys, when we go to the movie theaters, lets watch a comedy movie, I hear its hilarious. While this one is: Oh no I'm so sorry for your loss, it was a terrible tragedy that your son died in a car accident.
authors main point he is trying to get across without simply stating it
