The charge that western astrology is ”western” extends from the idea that it was refined west of India… And has nothing to with the fact that it comes to us moderns thru Greece.
For it came to us from Egypt or Kemet and thru the Greeks who passed it to the Arabs or Moors and then it was introduced there to Renaissance Europeans. From there it came to us as ”modern ” ”western” astrologers.
Cozmophyzix utilizes both and can therefore testify and show and prove via comparison that they both produce equally accurate forecasts and predictions.
Cozmophyzix 
The angles do not change whether you use Sidereal or Tropical. The predictions are ALWAYS made by the angles. It is that simple. Mathematics. The illusion is the background (the stars) when it is really based on aspects between the planets.
and the aspects that repeat from the natal configuration.