I have read with both. Twice with Ari, and several times with ST. Both are really good. The main difference is that Ari gives timeliness when ST does not. To my experience what ST says happened more or less within 3 months from the reading. Ari nailed down the exact date of my poi leaving me, she said end of May he will start being dismissive and distant, you will question his behavior and that is why he will leave. ST saw him leaving, said this man comes and goes with his energy, and wont stop if you accept this behavior. They both were aligned in him going back to his ex, and that wont be lasting because of his issues. This one last piece I cant validate.