comparing Object.create() object linkage to `new` constructor linkage

gistfile1.js

// making objects linked via Object.create()

var Foo = Object.create(null);
Foo.me = "Foo";
Foo.identify = function() {
	console.log("Me: " + this.me);
};
 
var Bar = Object.create(Foo);
Bar.me = "Bar";
 
var bar1 = Object.create(Bar);
bar1.me = "bar1";
var bar2 = Object.create(Bar);
bar2.me = "bar2";
 
Foo.identify(); // "Me: Foo"
Bar.identify(); // "Me: Bar"
bar1.identify(); // "Me: bar1"
bar2.identify(); // "Me: bar2"
 
Object.getPrototypeOf(Bar) === Foo;
Object.getPrototypeOf(bar1) === Bar;
Object.getPrototypeOf(bar2) === Bar;

gistfile2.js

// making objects via constructors called with `new`

function Foo(who) {
	this.me = who;
}
Foo.prototype.identify = function() {
	console.log("Me: " + this.me);
};

function Bar(who) {
	Foo.call(this,who); // a mixin but hard-coded to its parent
}
Bar.prototype = new Foo();

var bar1 = new Bar("bar1");
var bar2 = new Bar("bar2");
 
bar1.identify(); // "Me: bar1"
bar2.identify(); // "Me: bar2"
 
bar1 instanceof Bar; // true
bar2 instanceof Bar; // true
bar1 instanceof Foo; // true
bar2 instanceof Foo; // true

gistfile3.js

// making objects via constructors called with `new`
// mimicking a bit of what YUI does I guess?

function Foo(who) {
	this.me = who;
}
Foo.prototype.identify = function() {
	console.log("Me: " + this.me);
};

function Bar(who) {
	Foo.call(this,who); // a mixin but hard-coded to its parent
}
Bar.superclass = Foo.prototype;
Bar.prototype = Object.create(Foo.prototype);

var bar1 = new Bar("bar1");
var bar2 = new Bar("bar2");
 
bar1.identify(); // "Me: bar1"
bar2.identify(); // "Me: bar2"
 
bar1 instanceof Bar; // true
bar2 instanceof Bar; // true
bar1 instanceof Foo; // true
bar2 instanceof Foo; // true

gistfile4.js

// making objects linked via Object.create()
// this is the same as file 1 above, but uses a `init()`
// note: no hard-coding of the "inheritance" structure here

var Foo = Object.create(null);
Foo.init = function(who) {
	this.me = who;
};
Foo.identify = function() {
	console.log("Me: " + this.me);
};
 
var Bar = Object.create(Foo);
Bar.init("Bar");
 
var bar1 = Object.create(Bar);
bar1.init("bar1");
var bar2 = Object.create(Bar);
bar2.init("bar2");
 
bar1.identify(); // "Me: bar1"
bar2.identify(); // "Me: bar2"
 
Object.getPrototypeOf(Bar) === Foo;
Object.getPrototypeOf(bar1) === Bar;
Object.getPrototypeOf(bar2) === Bar;