Difference between dir() and vars() in Python

As Python stores their instance variables in the form of dictionary belonging to the respective object both dir() and vars() functions are used to list the attributes of an instance/object of the Python class. Though having a similar utility these functions have significant individual use cases.
dir() Function: 
This function displays more attributes than vars() function, as it is not limited to an instance. It displays the class attributes as well. It also displays the attributes of its ancestor classes.
vars() Function: 
This function displays the attribute of an instance in the form of a dictionary.
The below table provides with some significant difference between var() and dir(): 
 

Example 1: 

vars(list).keys()

Output: 

Example 2: 

dir(list)

Output: