What is the difference between Vedic astrology and Western astrology?
The most important and immediately noticeable difference is that
the planetary positions are different. While western astrology uses
the actual observed position of the planets and the zodiac, Vedic
astrology uses precession of the equinoxes, and that's why there
will be a difference in the planetary positions, so your planets
may be in an entirely different sign when you use the Vedic
astrology system.
The second important difference is that while western astrology
gives a lot of importance to Sun, Vedic astrology is based on
Moon.
In Vedic astrology there is a special tool called the Dasha that
is used to predict the events of a native's life while in western
astrology we use Transits.