Trouble understanding OOP in javascript

Question

Can someone please explain to me the difference between this two different writing :

var Box2DInt = {};
    Box2DInt.boot = function (game) { };
    Box2DInt.boot.prototype = {
         preload: function () {

         },
         create: function () {

       }
    }

AND

var boot=function(game){};
boot.prototype={
   preload:function(){

   },
   create:function(){

   }
}

Answer 1

Both of these create a constructor function (although they use anonymous functions and assign them to variables/properties without a Capitalised first letter, which isn't best practise).

One stores the resulting function in a variable.

The other stores it as a property of an object.

There's no difference in the functions themselves.