CREATE TABLE table_203_221 (id DECIMAL, "name" TEXT, "nationality" TEXT, "matches played" DECIMAL, "goals scored" DECIMAL, "notes" TEXT)

how many more goals did archie thompson score than billy celeski ?
SELECT (SELECT "goals scored" FROM table_203_221 WHERE "name" = 'archie thompson') - (SELECT "goals scored" FROM table_203_221 WHERE "name" = 'billy celeski')
SELECT (SELECT "goals scored" FROM "table_203_221" WHERE "name" = 'archie thompson') - (SELECT "goals scored" FROM "table_203_221" WHERE "name" = 'billy celeski')