无法制作独特的javascript对象.这段代码出了什么问题？

function MyObject(name, age) {
  this.name = name;
  this.age = age;
}

MyObject.prototype.sayHello = function() {
  console.log("Hello, " + this.name);
};

var obj1 = new MyObject("John", 25);
var obj2 = new MyObject("Jane", 30);

obj1.sayHello(); // 输出：Hello, John
obj2.sayHello(); // 输出：Hello, Jane

class MyObject {
  constructor(name, age) {
    this.name = name;
    this.age = age;
  }

  sayHello() {
    console.log("Hello, " + this.name);
  }
}

let obj1 = new MyObject("John", 25);
let obj2 = new MyObject("Jane", 30);

obj1.sayHello(); // 输出：Hello, John
obj2.sayHello(); // 输出：Hello, Jane

var obj1 = { name: "John", age: 25 };
var obj2 = { name: "Jane", age: 30 };

console.log(obj1 === obj2); // 输出：false