What's the difference between these two IIFE invocation syntaxes?

Question

(function f() {
    // do something
}());

vs

(function g() {
    // do something
})();

Note the position of the ending parentheses.

1. Do these execute in the same manner?
2. Do they restrict the scope of variables differently?

Answer 1

They are the same. Just two notations to do the same thing. Some people find one notation more intuitive than the other. Just a matter of preference, nothing more than that.