The difference between the two is only the difference in application conditions:

Postgraduate entrance examination generally requires candidates' academic qualifications to meet one of the following conditions:

(1) fresh graduates with nationally recognized academic qualifications;

(2) Persons with a nationally recognized bachelor's degree;

(3) Persons who have obtained a nationally recognized college diploma for two years or more (from college graduation to being admitted as a master's student on September 1 day, the same below), who have reached the same academic level as college graduation and meet the specific business requirements put forward by the admissions unit according to the training objectives of the unit; Undergraduate graduates with nationally recognized academic qualifications and recent graduates of adult colleges and universities shall apply for the examination according to the equivalent academic qualifications of undergraduate graduates;

(4) Those who have obtained a master's degree or a doctor's degree may apply for a master's degree again, but only those who entrust training or raise funds by themselves;

Combined with the current situation of academic education in China, the specific application requirements are as follows.

Due to the constant adjustment and changes in various aspects, the information provided below is for reference only. Candidates are requested to take the official information published by the authoritative department as the standard.

College graduates: those who have graduated for two years or more with a nationally recognized college degree (from September of the year when they graduated to the year when they were admitted to the master's degree 1 day), have obtained the same academic qualifications as college graduates, and meet the specific business requirements put forward by the admissions unit for candidates according to the training objectives of their own units, apply as undergraduate graduates;

So you have to wait two years after graduation and apply for the same degree.