State the difference between soft law and hard law

Soft laws are principles or rules that are often followed by states in practice, but where the practice is not consistent enough, widespread enough or merely enough to argue the rule in question has become customary international law or is a general principle of law. In the EU it is opinions, recommendations, communications etc. Example is covid regulations. Can have bigger impact and are not binding. Hard laws are legal obligations that are binding on the parties involved and which can be legally enforced before a court. Like regulations etc.