"Ordered" Chaos does not describe who and what Sonic is at all. Sonic himself is just pure chaos, that's the nature of his being and his personality and stuff. He lives life freely and with nothing holding him back, doing whatever he wants whenever he wants, free to go where the wind takes him. It's because of this that he is an Embodiment of Chaos, and completely goes against the concepts of "Order" "Control" or "Limitation". Bringing Order to Chaos is what Knuckles is, as Guardian of the Master Emerald and living his entire life with the sole purpose of fulfilling that responsibility, always remaining there on the island and watching over the alter. Ordered Chaos itself, or Chaos that has been Controlled, manipulated, and directed, is all Shadow. Shadow, at his core, is a dark-incarnation of Sonic, meaning he is essentially another Sonic, and thus, pure Chaos. But, he was artificially engineered to be the Ultimate Lifeform, with a specific purpose he was meant to fulfill, such as curing Maria's illness or being used as the Military's secret weapon.