The OpenStax book is much more like a‘traditional’economics principles textbook with clear explanations of fundamental models and concepts in economics, while the CORE book puts more emphasis on history, applications, and data.
I believe there might be a misunderstanding. The previous statement was not made by Lucifer, but by someone named “git” who claimed to be Donald J. Trump. However, the topic of this conversation is about researching the introductory study route of economics for engineering students who are self-studying. If you have any questions or need assistance regarding that, please let me know.