1. The objects are different: the former is established for criminal suspects and defendants in public prosecution cases and defendants in private prosecution cases, while the latter is for private prosecutors and victims. Established with parties to attached civil litigation.
2. Defenders and litigation attorneys enter criminal proceedings in different ways. The former can enter the proceedings through the appointment of the court in addition to entrustment. The agent can enter the proceedings under the authorization of the principal.
3. The status of a defense lawyer is completely different from that of an attorney. The former has an independent status and is not affected by the will of the criminal suspect, nor is it subject to interference by individual groups such as courts and procuratorates. The latter must operate within the scope of the principal's legal authorization, because the agent's actions not only have the same effect as the principal's actions, but also bear all the legal effects generated by the principal.