Proper use of SqlDataReader

I've seen 2 examples of SqlDataReader

The first one has a using which manages the disposal of the connection and the used memory, and the second has less code.

Which one is to prefer?

using (SqlConnection myConnection = new SqlConnection(ConnectionString))
{
    myConnection.Open();
    using (SqlCommand cmd = new SqlCommand("SELECT Name FROM User;", myConnection))
    {
        using (SqlDataReader reader = cmd.ExecuteReader())
        {
            while (reader.Read())
            {
                DoStuff((string)reader["Name"]); 
            }
        }
    }
}

second one :

using (SqlConnection mConnection = new SqlConnection(ConnectionString))
{
    mConnection.Open();
    using (SqlCommand cmd = new SqlCommand("SELECT Name FROM User;", mConnection))
    {
        for (SqlDataReader reader = cmd.ExecuteReader(); reader.Read(); )
        {
            DoStuff((string)reader["Name"]);
        }
    }
}