What is the difference between XML <span style="color: #222222; font-family: arial, sans-serif; font-size: 16px; background-color: #ffffff;">serialization</span> and Binary <span style="color: #222222; font-family: arial, sans-serif; font-size: 16px; 19.2px; background-color: #ffffff;">serialization and which is best ?</span>