Each version of the book has its own unique advantages and characteristics, and the specific choice of which version is good should be considered in combination with personal needs and actual conditions. For example, if you want to systematically train and improve mathematics, you can choose to train the best; If you are interested in math contest, you can choose math contest.
It is suggested that before choosing to buy, you should check the detailed introduction and sample chapters of relevant books in the physical bookstore or online, so as to make a more suitable choice. In addition, you can also consult the school teachers or the instructor of the subject competition to get more targeted suggestions.