Is there a difference between Economics and Astrology?

Economics can predict simple systems, but scales very poorly. The world is complicated, so complicated noone understands it all (maybe Buffet but probably not, i guess he concentrates of specific areas and signals).

Yes.
Astrologers (successful ones) have a good insight into people and what makes them tick.

“An economist is an expert who will know tomorrow why the things he predicted yesterday didn't happen today.”
-Laurence J. Peter

Richard C