Hey Smart Guy,
Good question - the difference is significant. Here's the lowdown:
Each of our 5 Math Strategy Guides provides in-depth instruction in one of the GMAT’s principal quantitative content areas: Number Properties (93 pages), Fractions, Decimals, & Percents (81 pages), Word Translations (123 pages), Equations, Inequalities, & VIC’s (123 pages), and Geometry (97 pages).
Each math guide breaks down its particular content area into distinct topics and builds comprehensive content understanding by providing rules, strategies and in-depth examples of how the GMAT tests a given topic and how you can respond accurately and quickly. Each of the many chapter topics in a given Strategy guide is followed by 15 challenging practice problems (NOT GMAT questions - these have no answer choices), progressively increasing in difficulty, and designed to increase your ability from novice to expert in the given topic. Answers with comprehensive explanations follow each problem set.
Our 2 Verbal Strategy Guides each provide in-depth instruction in the GMAT’s principal verbal content areas: Sentence Correction (143 pages), and Critical Reasoning & Reading Comprehension (107 pages).
The Sentence Correction guide takes the guesswork out of grammar by presenting every major grammatical principle and minor grammatical point tested on the GMAT. Each of the chapters provides in-depth examples of how the GMAT tests a given grammatical topic and is followed by 15 challenging practice problems designed to increase your ability from novice to expert in the given topic (again, not GMAT questions).
The Critical Reasoning & Reading Comprehension guide aims to simplify complex arguments and passages by illustrating innovative diagramming techniques designed to build speed and improve accuracy. These techniques are outlined in a step-by-step method and accompanied by numerous examples and sample diagrams with which to measure your progress.
After mastering all of the topics and problem sets in each of the 7 Strategy Guides, you can test your knowledge on problems that have appeared on past GMAT exams, in the The Official Guide. We've categorized all the problems in The Official Guide by topic and subtopic, and each Manhattan GMAT Strategy Guide contains its own categorized list of problems from The Official Guide. These problem lists, organized by subtopic and difficulty level, are designed to help you further refine and practice the skills learned in each content area.
If you have any other questions, please do not hesitate to ask. I'm just getting acquainted with Beat the GMAT, but I will be checking in regularly.
Kim Watkins
Senior Director, Marketing and Student Services
Manhattan GMAT
Contributor to Beat The GMAT!