Maqam Saba Zamzam resembles maqam Saba, except the 2nd note is 1/4 step lower. In other words instead of the first 3 notes forming the begiing of a Bayati tetrachord, they form the begiing of a Kurd tetrachord. In practice this maqam is rarely used by itself, it is usually used as a modulation from maqam Kurd.