Reply :- It is very different from Astrology or Jyotish. Jyotish or Astrology is a having three parts (1)Mathmatical (2)Principle (3) Predictive. It is predictive part, which is related to Intuition + Psychic + Blessings of Teachers. It is more like a combination of Knowledge and Mystic Bliss. Where as Tantra is combination of Tattva or the science of cosmic principles, and "mantra" refers to the science of mystic sound and vibrations. Tantra therefore is the application of cosmic sciences with a view to attain spiritual ascendancy. In another sense, tantra also means the scripture by which the light of knowledge is spread: Tanyate vistaryate jnanam anemna iti tantram.
Astrologer uses chart to predict something about the native and Tantra directly corrects the Aura or Cosmic affiliation or strength of native. Hence Tantra is more powerful. According to Guru of Astrology as well as Tantra, in Tanta problem Astrology looses its penetrative power, hence DASA etc do not works for the native.