CREATE TABLE table_204_641 (id DECIMAL, "pos" TEXT, "no" DECIMAL, "driver" TEXT, "constructor" TEXT, "laps" DECIMAL, "time/retired" TEXT, "grid" DECIMAL, "points" DECIMAL)

what is the difference in points between chris amon and jim clark ?
SELECT ABS((SELECT "points" FROM table_204_641 WHERE "driver" = 'chris amon') - (SELECT "points" FROM table_204_641 WHERE "driver" = 'jim clark'))
SELECT ABS((SELECT "points" FROM "table_204_641" WHERE "driver" = 'chris amon') - (SELECT "points" FROM "table_204_641" WHERE "driver" = 'jim clark'))