Which ingredient is used in the New York potato salad but not in the Southern style potato salad?

In New York potato salad, one of the distinguishing ingredients is the use of carrots, which adds a sweet crunch and vibrant color to the dish. This variation often includes ingredients like onions, celery, and a dressing that may contain mustard or mayonnaise, but it typically features carrots as a signature element.

Southern-style potato salad, on the other hand, usually does not include carrots. Instead, it often emphasizes other ingredients such as mayonnaise, hard-boiled eggs, and sometimes relish or mustard, giving it a creamier texture and a slightly different flavor profile. Each style reflects regional tastes and preferences, making carrots a key differentiator in New York potato salad.