Difference: I don't know.

Similarities: selling books//running training courses to make money.

PS:

(1) If possible, reject all junior and senior high school math competitions.

(2) Learn more textbooks and exercises after class.

(3) Have more time to communicate with math teachers.

(4) Study hard and exercise more. Good health+good mentality can make you play at the normal level or even beyond the level in the college entrance examination.