dynamic vs anonymous types

using System;
using System.Collections.Generic;
using System.Dynamic;
using System.Linq;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            dynamic x = GetAThing();
            Console.WriteLine(x.Title);


            var myFoos = new[]
                {
                    new Foo
                        {
                            Id = 1,
                            Bar = "one",
                            Baz = "eno"
                        },
                    new Foo
                        {
                            Id = 2,
                            Bar = "two",
                            Baz = "owt"
                        }
                };


            var myNewFoos = myFoos.Select(y => new {y.Bar, y.Baz});
            foreach (var cur in myNewFoos)
            {
                Console.WriteLine(cur.Bar, cur.Baz);
            }


            Console.ReadKey();
        }

        public class Foo
        {
            public int Id { get; set; }
            public string Bar { get; set; }
            public string Baz { get; set; }
        }

        static dynamic GetAThing()
        {
            dynamic foo = new ExpandoObject();
            foo.Title = "Foo";
            return foo;
        }

        static void ProjectFoos(IEnumerable<Foo> foos)
        {
            var myNewFoos = foos.Select(y => new { y.Bar, y.Baz });
            //return myNewFoos;
        }
    }
}