Adam Ficsor [@nopara73] explains that the cryptography in ZeroLink is very simple, and that prevents us from doing many advanced things. Privacy is only achieved for coins of a standard denomination value, but the coordinator and outside observers can spy on the non-standard change coins.
WabiSabi uses more advanced cryptography tailor-made for CoinJoin, to create private arbitrary amount CoinJoins, which was not possible before!
