My suggestion? It's July. Applications aren't due until November. Write both, and then read them back and decide which one you like better. Here's my advice for each essay:
1.) For the comedic one, make sure that you have a set topic in mind. I don't know if you just didn't mention it in this post or if you genuinely don't have one, but it's never a good idea to write anything if the topic doesn't matter to you. Also, don't try and write an essay just to be funny, especially if you're not a funny person by nature. It's good to be cheerful and stand out, but there needs to be meaning behind it and it needs to be true to yourself.
2.) At the same time, I wouldn't describe an essay as "dramatic and existential," because in the hands of the wrong person it can easily turn "melodramatic and self-important." However, your topic sounds very interesting, and something that people would be interested in reading.