Numerology's most famous number goes by several passports. In the English-language, Pythagorean-descended tradition that dominates Western bookshops and apps, it's the life path number. In much of Indian numerology, the same birth-date arithmetic is usually called the destiny number, or bhagyank.
Both traditions are doing the same fundamental thing: taking every digit in a birth date and collapsing them, through repeated addition, into one number believed to say something about the shape of a life.
Where they can differ isn't the ingredients — it's a single procedural choice. Western numerology, following a Pythagorean fondness for the numbers 11, 22, and 33, frequently stops reducing early if a sum lands on one of those. Vedic-influenced practice more commonly keeps reducing regardless, treating every total as fair game for further division.
