The two sets of questions you mentioned, the author's first purpose is to earn profits through these two books, are multiple sets of questions compiled by one or two people, and each set of real questions has been repeatedly scrutinized by countless experts. His purpose is to select talents for the country, so as to know the quality of the real question! Don't be fooled by some eye-catching titles such as betting questions or sprints on the market!
Of course, if you have a good real topic and a solid foundation, neither of the above two books is the same. ...
From the personal experience of a person who has taken the postgraduate entrance examination, I wish you success!