Difficulty: complete textbook interpretation > textbook help. This is a very subjective feeling, and the difficulty of judgment is related to your own learning level. This conclusion is for reference only. Whether it is examples or exercises, the complete interpretation of textbooks is generally more difficult than the help of textbooks, but it is not much. The difficulty of the two is basically maintained at a medium level, and ordinary students can buy them without finding them difficult to use.
Yan value: textbook help > complete interpretation of textbooks. It's entirely my own aesthetic. The cover design of both books is very simple, one with a white background and the other with a dark background, depending on your preference.
Typesetting: Complete Interpretation of Textbooks > Textbook Help. In terms of crowding, the textbook gang is more obvious. However, a complete interpretation of textbooks is not without this problem. In terms of blank topics, it can be said that there is almost no blank space in Textbook Help, but there are still some blank spaces in Textbook Complete Interpretation. But the space left by the two should be insufficient, so don't "pot calling the kettle black".
Conclusion: It is actually difficult to decide which of the two books to choose. It depends more on your own level. If you think the title "textbook gang" is simple, then choose "full interpretation of textbooks" If you want to explain in more detail and don't read much, then choose a textbook to help. The best way is to look at the physical book before deciding which one to buy. Sometimes the feel of the book will also determine the purchase decision. Choose one you like. Of course, I know none of you like teaching AIDS.