Vedic astrology looks at the same birth moment through a different coordinate system and different rules for interpreting a chart.
A Kundali is calculated from the exact time and place of birth, then interpreted through planets, houses, the Moon, nakshatra, lunar nodes, Atmakaraka and other traditional indicators. A special role is played by dashas - personal planetary periods, which connect the birth chart with different stages of life.
If you want to see a foundational Vedic portrait, open Vedic Kundali: it covers character, relationships, family, career, money, talents and life path. If the question is specifically about marriage, Vedic compatibility adds traditional criteria for a couple, including Ashta-kuta, and separately considers family roles, intimacy, responsibilities and how the partners’ personal periods align. For timing, use Vedic year forecast, where dashas are compared with the movement of the planets by month.
When is it better to choose another method? If you need a Western view with synastry, horary, rectification and selection of the day, go to Astrology. If you are interested in the five elements and ten-year cycles - Bazi. For one question without a full birth chart, Tarot or Runes will be faster.
In Omnia, the Vedic chart is not an approximation. Planetary positions are calculated for the exact birth moment, place and time zone, then the rules of the Vedic system are applied and the indicators and periods associated with it are calculated. The interpretation begins only after this basis is ready.
Therefore, “accuracy” here refers to the calculation of the underlying chart and the consistency of the method. Interpretations of Kundali and dashas remain an astrological interpretation meant for introspection and familiarity with tradition, rather than a proven way to predict future events.