CREATE TABLE table_203_151 (id NUMBER, "no." NUMBER, "date" CLOB, "tournament" CLOB, "winning score" CLOB, "margin of\ victory" CLOB, "runner ( s ) -up" CLOB)

how many more strokes were in the klm open than the barclays scottish open ?
SELECT (SELECT "margin of\nvictory" FROM table_203_151 WHERE "tournament" = 'klm open') - (SELECT "margin of\nvictory" FROM table_203_151 WHERE "tournament" = 'barclays scottish open')
SELECT (SELECT "margin of\nvictory" FROM "table_203_151" WHERE "tournament" = 'klm open') - (SELECT "margin of\nvictory" FROM "table_203_151" WHERE "tournament" = 'barclays scottish open')