Vedic astrology is different from tropical astrology, its western counterpart. Its not like Vedic is better then tropical astrology but of course a bit different.
Each approach of Astrology India looks at the universe in its own way and represents specific methodologies.
The charts of Vedic and western astrology are shaped differently. Vedic chart is square where as traditional western chart is round.
In India in fact two major square chart formats are used. In the North they use a chart crisscrossed with lines, resembling a box of triangles. Any of you who have seen charts created during the European Renaissance period, such as those constructed by Kepler, will find it similar to the North Indian style. In Southern India, a large box containing 12 smaller boxes on its inner edges forms the chart.
Many people are not aware of this that the earth vibrates backwards on its axis of rotation, much like the motion of a spinning top. Vedic astrology compensates for this backward drift of the earth's rotation, which amounts to about 1 degree every 72 years. The Western systems do not. The Western Tropical system and Vedic astrology were somewhat aligned until the late 200's AD, but are not so today because of the back shifting.