Is the distance query accurate?

[medilies]

Using ST_DISTANCE_SPHERE

SELECT
    ST_DISTANCE_SPHERE(
        POINT(-0.32170480372414134, 35.85398240387264),
        POINT(-0.6368148560996869, 35.70035747269707)
    )
-- 33164.40908920633

Using the package used formula

SELECT
    (
        6378137 * ACOS(
            COS(RADIANS(-0.32170480372414134)) * COS(RADIANS(-0.6368148560996869)) * COS(
                RADIANS(35.70035747269707) - RADIANS(35.8539824038726)
            ) + SIN(RADIANS(-0.32170480372414134)) * SIN(RADIANS(-0.6368148560996869))
        )
    )
-- 39024.309979598984