There is a big difference between version A and version B of senior high school mathematics. In my opinion, the difference is as follows:

Difficulty is different: version A of senior high school mathematics published by PEP is simpler than version B.

The editing module is different: version A is a traditional geometric way to solve solid geometry problems with axiomatic theorem as auxiliary line. Version B is a new content, which follows the knowledge of the plane vector part of the first volume of senior high school, solves the solid geometry problem with the method and concept of space vector, and solves the geometry problem with algebraic calculation.

Implement different regions: version A and version B are divided into "regions", that is, one version of teaching materials is generally used in the same region.

Emphasis is different: version B pays more attention to revealing the essence of concepts and improving mathematics literacy than version A, and version A is suitable for self-learners or students who don't have so high requirements for high school mathematics.