Object literal vs. constructor -- proof of concept

gistfile1.js

/**
 * Single object -- object literal
 */
var db = {
  host: 'localhost',
  dbname: 'myDB',
  credentials: {
    username: 'dbuser',
    password: 'dbpassword'
  },
  connect: function() {
    console.log(
      'Connecting to %s with %s:%s on %s', 
      this.dbname,
      this.credentials.username,
      this.credentials.password,
      this.host
      );
  },
};

/**
 * Constructor
 */
function DB(dbname, credentials, host) {
  this.dbname = dbname;
  this.host = host;
  this.credentials = credentials;
}

DB.prototype.connect = function() {
  console.log(
      'Connecting to %s with %s:%s on %s', 
      this.dbname,
      this.credentials.username,
      this.credentials.password,
      this.host
      );
};


var myNewDb = new DB('myDataBase', {
  username: 'someuser',
  password: 'somepass'
},
'localhost');

myNewDb.connect();

var myOtherDb = new DB('myOtherDatabase', {
  username: 'anotheruser',
  password: 'anotherpass'
}, 'otherhostname');

myOtherDb.connect();