C++ stack variables and heap variables

When you create a new object in C++ that lives on the stack, (the way I've mostly seen it) you do this:

CDPlayer player;

When you create an object on the heap you call new:

CDPlayer* player = new CDPlayer();

But when you do this:

CDPlayer player=CDPlayer();

it creates a stack based object, but whats the difference between that and the top example?