Most Easy Solution || Using Set
Code

# Code
```python3 []
class Solution:
    def findDifference(self, nums1: List[int], nums2: List[int]) -> List[List[int]]:
        a = set(nums1) - set(nums2)
        b = set(nums2) - set(nums1)
        li = [list(a),list(b)]
        return li
```
['Array', 'Ordered Set', 'Python', 'Python3']