1. Time: Joining the army during college means joining the army during college, and joining the army after graduation means joining the army after graduation.
2. How to join the army: During college, you usually join the army through military schools and military training, but after graduation, you can join the army through conscription and enlistment.
3. Education background: Soldiers who joined the army during college usually did not finish their college studies, while soldiers who graduated from the army had already finished their college studies.
4. Post arrangement: Soldiers who join the army during college usually need to receive certain training and education in the army, while soldiers who graduate from the army can be directly arranged in corresponding posts.
It should be noted that whether you join the army during college or after graduation, you need to abide by military discipline, obey orders and complete tasks.