c++ - Difference between Object object = new Object() and Object object

If I have a class named Object, what's the difference between creating an instance just like that:

#include 

Object var;

main ()
{

    var.test();
}

or

#include 

main ()
{

    Object* var = new Object();
    var->test();
}

Which is the differente between a global object (which you can use wherever you want) and create a dynamic object in the main.cpp? In theory it should be the same, right? The both method can be used in any file.cpp.