Write a Python program to create a difference of sets. The function should take in two sets and return the difference of the two.
Example 1:
Input: {1, 2, 3, 4}, {3, 4, 5, 6}
Output: {1, 2}
Example 2:
Input: {"apple", "banana", "cherry"}, {"banana", "cherry", "dates"}
Output: {"apple"}