What?
First of all, I love the Wire and I don't even need to click the link to know what scene you're referring to.
I'm actually not convinced that you've seen Pulp Fiction if you're comparing Tarantino unnecessarily saying the N word multiple times to one of the best scenes in television history.
In fact, I remember one of the quotes from Tarantino from when Vincent and Sam Jackson's character (forget his name off the top of my head) pull up to Tarantino's character's house after accidentally shooting Martin in the head in the backseat of the car.
Tarantino's completely necessary joke, the one you're comparing to a scene from The Wire is,
Is there a sign on my law that says dead n****r storage?
Wow, so funny and necessary.