I assume you mean Kathy & Bert's book? That's a great book. In fact, I was a contributor to that book and wrote parts of a few chapters. (Scott wrote the topics in our book that I had contributed to K&B. And of course he wrote many other topics too!)
Different authors have different styles of book writing. And different publishers have different templates/styles of book. For example, our publisher (Wiley/Sybex) has flashcards online for study guides which I haven't seen from any other publishers. Different books go into more depth about different topics But ultimately, different readers have different preferences and learning styles and some people will prefer certain books to others.
Right now, this is a moot point because K&B covers Java 7 and you need a study guide for the exam you are taking.