  The difference between a law and a rule is that laws are enforced by the police and are therefore just legal rules. Although there are rules and regulations that are nee … ded to follow in a society, they are distinguished by who are responsible for them and how they are formed.ot so much for rules, which are … still important, but are usually set by people for health, safety, etc. it is not illegal, as such, to break the rules, although it is still important to abide by them and the law. that is my description of the difference between the two.