There's a great deal of published information about astrology which probably follows a number of closely-related basic ideas (don't ask me to be specific, I don't know much about it). When an astrologer follows those ideas relative to the suggested attributes of the various star signs and filters them through the current day's star chart, it's likely that they will produce similar results.
The variations will depend on the background and understanding of the individual astrologer. They have no value other than entertainment.
On the other hand I've known sensitives who come up with some surprisingly accurate ideas, working one-on-one with a subject. They may use astrology, numerology, tarot, scrying, clairvoyance, or the entrails of a dead chicken. Such people seem to use their chosen device to focus their intuition. Media fortune-tellers are unable to do that.