Write SQL query to solve given problem: Calculate the difference between the number of customers and the number of subscribers who did the trip in June 2013.. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT SUM(IIF(subscription_type = 'Subscriber', 1, 0)) - SUM(IIF(subscription_type = 'Customer', 1, 0)) FROM trip WHERE start_date LIKE '6/%/2013%'