Two methods for creating a type instance in reflection

First, create an object from the constructor.

Object O =   Null ;
System. type T = System. type. GetType ( This . Type );
Constructor = T. getconstructor ( New Type [ 0 ]); // T. getconstructor (type. emptytypes) can also

O=Constructor. Invoke (Null);

Static reflection method 2

Object O =   Null ;
System. type T = System. type. GetType ( This . Type );
O = System. activator. createinstance (t, True );

Activator contains specific methods to create object types locally or remotely, or to obtain references to existing remote objects.

What are the differences between the two methods?