What is better EW OR P/NP for a major course

So I didn’t/couldn’t find a forum where I could find more about the options W, EW and P/NP grading. So I am posting it now in hopes of getting my question answered.
I am transferring this year so this semester has and is going to have an important impact. I decided to take genetics for this Fall. However, I am struggling so badly and after having a talk with my prof about it there was really nothing to be done and it was not helpful. I am really thinking of getting a EW (excused withdraw) or a P/NP grade for the course however, at this point I do not know which one to pick. My main concern is how it will look on my transcript as a transfer student from a college. Please help a fellow student, thank you.