Difference between these two declarations of immediate functions [duplicate]

What's the difference between:

(function() {
    console.log('Hello :)');
})();

e:

(function() {
    console.log('Hello :)');
}());

? The two code snippets do the same thing, so I was left wondering if there is any difference other than writing or if they are just different ways of doing the same thing, without performance implications and etc ...