Canada has one unified criminal code nation wide. For instance a province can't make weed legal or enact laws banning certain guns that are ok in others. The weird regional variations in Canada are like, ICBC as monopoly car registration + vehicle liability insurance in BC. Quebec language laws are another weird regional thing.

Canada has heavier restrictions on interstate/provincial commerce, including the fact that it is generally illegal to bring alcohol between provinces: https://en.m.wikipedia.org/wiki/Canadian_Free_Trade_Agreemen...