What is the treatment of political and legal units, procuratorates, courts and judicial bureaus? What is the difference?

Law department: good unit, good salary, tired work, failing the department exam, and poor promotion prospects. Procuratorate: generalization, fair treatment, and gradual expansion of authority. I failed the department exam, and I'm not a law major, so my promotion prospects are not great. Judicial Bureau: A good unit is authoritative and fair, and both lawyers and prisons are in charge, and general notarization is also concentrated here. Personally, I think these units are similar, and the courts are more tired because there are so many cases in the courts.