Adopted from the following great insight shared by Simon Sinek from his book Start With Why
The VISION Statement is the PUBLIC statement of the founder’s intent , WHY the company exists.
It is like the VISION of the future which does not exist now.
The MISSION statement is the description of the route or guiding principles , HOW the company intends to create the future.
In all iconic organizations be it Apple , SouthWest Airlines , CostCo there is a clear difference between these two statements on the basis of WHY and HOW respectively.