MySQLで2つのクエリ結果が等しいかどうかを比較するにはどうすればよいですか？

SELECT
  CASE WHEN count1 = count2 AND count1 = count3 THEN 'identical' ELSE 'mis-matched' END
FROM
(
  SELECT
    (SELECT COUNT(*) FROM <query1>) AS count1,
    (SELECT COUNT(*) FROM <query2>) AS count2,
    (SELECT COUNT(*) FROM (SELECT * FROM query1 UNION SELECT * FROM query2) AS unioned) AS count3
)
  AS counts