Tarot vs Astrology

I have been asked to discuss the difference between reading Tarot Cards an reading a Astrology Chart:  Both are tools of information about a person's Life, be it their Astrology Birth chart, which tells us proclivities of their nature, via the stars, positions they are in, houses they represent and aspects they make with each other and transits of the positions of the stars now layered across your birth chart.  Where as Tarot Cards, now they provide information about your decisions one's  you have made in this life, options you get to make, and circumstances that surround these choices.  I personally work with both of these tools to fine tune my understanding about the person in question.