CREATE TABLE table_203_340 (id DECIMAL, "rank" DECIMAL, "airport" TEXT, "passengers handled" DECIMAL, "% change 2011 / 12" DECIMAL)

between the topped ranked airport , netherlands - amsterdam , & spain - palma de mallorca , what is the difference in the amount of passengers handled ?
SELECT (SELECT "passengers handled" FROM table_203_340 WHERE "airport" = 'netherlands - amsterdam') - (SELECT "passengers handled" FROM table_203_340 WHERE "airport" = 'spain - palma de mallorca')
SELECT (SELECT "passengers handled" FROM "table_203_340" WHERE "airport" = 'netherlands - amsterdam') - (SELECT "passengers handled" FROM "table_203_340" WHERE "airport" = 'spain - palma de mallorca')