map vs obj

map.js

var a = {a: 1}
var b = {b: 2}
var map = new Map();
var obj = {};

obj[a] = "***";
obj[b] = "###";
map.set(a, "***");
map.set(b, "###");

console.log('// obj[a] === obj[b]');
console.log('obj[a]: ', obj[a]);
console.log('obj[b]: ', obj[b]);

console.log();

console.log('// map.get(a) !== map.get(b)');
console.log('map.get(a): ', map.get(a));
console.log('map.get(b): ', map.get(b));