The best way to instantiate a new object

Hey,

There are 3 different ways to create a new object:

Code:

---

let myObject = {};

---

Code:

---

var myObject = {
    name: “Engage",
    days: 30
}

---

Code:

---

var myObject = new Object();

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Now my question is about the 2 different ways of instantiating a new object.

You can either use an existing object as prototype of your new object, like this:

Code:

---

var person = {
  name: "David",
  age: 20,
};

// Create theDude object and use person object as its prototype
var theDude = Object.create(person);

---

Or you can use a Constructor function to create your new object like this:

Code:

---

function Person (name) {
    this.name = name;
    this.age = 20;
    this.getInfo = function getInfo() {
        return this.name + ' is ' + this.age + ' years old.';
    };
}
 
// Instantiating a new object using the new keyword and a constructor function
var theDude = new Person("David");

---

My question is:

What is the difference between the last 2 methods of instantiating a new object?
Which method is more recommended?
In the real world, which one is used more?

Thanks