CREATE TABLE table_203_366 (id DECIMAL, "pos" DECIMAL, "class" TEXT, "no" DECIMAL, "team" TEXT, "drivers" TEXT, "chassis" TEXT, "engine" TEXT, "laps" DECIMAL)

who completed more laps , phil hill or richard attwood ?
SELECT "drivers" FROM table_203_366 WHERE "drivers" IN ('phil hill', 'richard attwood') ORDER BY "laps" DESC LIMIT 1
SELECT "drivers" FROM "table_203_366" WHERE "drivers" IN ('phil hill', 'richard attwood') ORDER BY "laps" DESC NULLS LAST LIMIT 1