The main difference between Turkish coffee and regular coffee or espresso is that the coffee beans used for Turkish coffee need to be ground very finely, until they reach the consistency of powdered sugar.   In addition, Turkish coffee is unfiltered, meaning that the coffee grounds are poured into the cup and settle to the bottom.  This makes the Turkish coffee much more caffeinated, and people often only drink one small cup.  Also, sugar is not added to the coffee at the table, but added during the coffee brewing process.