What is the difference between Task.Run() and Task.Factory.StartNew()

I have Method :

private static void Method()
{
    Console.WriteLine("Method() started");

    for (var i = 0; i < 20; i++)
    {
        Console.WriteLine("Method() Counter = " + i);
        Thread.Sleep(500);
    }

    Console.WriteLine("Method() finished");
}

And I want to start this method in a new Task.
I can start new task like this

var task = Task.Factory.StartNew(new Action(Method));

or this

var task = Task.Run(new Action(Method));

But is there any difference between Task.Run() and Task.Factory.StartNew(). Both of them are using ThreadPool and start Method() immediately after creating instance of the Task. When we should use first variant and when second?