Clone() : method returns a new array (a shallow copy) object containing all the elements in the original array.
CopyTo() : method copies the elements into another existing array.
Both perform a shallow copy.
A shallow copy means the contents (each array element) contains references to the same object as the elements in the original array.
A deep copy (which neither of these methods performs) would create a new instance of each element's object, resulting in a different, yet identacle object.