CREATE TABLE table_203_166 (id DECIMAL, "pos" TEXT, "no" DECIMAL, "rider" TEXT, "manufacturer" TEXT, "laps" DECIMAL, "time" TEXT, "grid" DECIMAL, "points" DECIMAL)

what is difference in points between valentino rossi and dani pedrosa ?
SELECT (SELECT "points" FROM table_203_166 WHERE "rider" = 'valentino rossi') - (SELECT "points" FROM table_203_166 WHERE "rider" = 'dani pedrosa')
SELECT (SELECT "points" FROM "table_203_166" WHERE "rider" = 'valentino rossi') - (SELECT "points" FROM "table_203_166" WHERE "rider" = 'dani pedrosa')