Tropical astrology rules the body-mind — the incarnate self moving through seasonal time. It is the chart we use for Medical Astrology, reading the body as a living cosmogram.
Sidereal astrology tracks the actual stars — the fixed stellar geometry your soul oriented to before it ever entered a body. Astral means of the stars. It is the soul's chart.
When you lay them side by side, you stop asking which one is correct — and start listening to the conversation between them.