CREATE TABLE table_203_678 (id DECIMAL, "rank" DECIMAL, "wrestler" TEXT, "no. of reigns" DECIMAL, "combined\ defenses" DECIMAL, "combined\ days" DECIMAL)

what is the difference in combined defenses between hiroshi tanahashi and kensuke sasaki ?
SELECT (SELECT "combined\ndefenses" FROM table_203_678 WHERE "wrestler" = 'hiroshi tanahashi') - (SELECT "combined\ndefenses" FROM table_203_678 WHERE "wrestler" = 'kensuke sasaki')
SELECT (SELECT "combined\ndefenses" FROM "table_203_678" WHERE "wrestler" = 'hiroshi tanahashi') - (SELECT "combined\ndefenses" FROM "table_203_678" WHERE "wrestler" = 'kensuke sasaki')