Today , I received OG11th + Verbal Review and Quant Review Books
I spent couple of minutes to compare them with my OG 10th edition
Here is what I found
OG 11th Edition
1. SC has only 138 Questions, I compared about 10-12 questions they are different. So it seems like SC questions in the 11th edition are different
2. CR 124 Questions. Compared first 5 , they are different.
3. RC 141 Questions, I compared first 5 passages and one was repeat form OG10 but the order was different..
So it seems like there may be couple of questions that are repeat from OG10..
Explanations of all the answers is nicely structured, easy to read and review as compared to the single paragraph explanation found in OG10.
Each explanation identifies the topic being tested. This is again a Plus.
The book is quite heavy due to use of nice quality paper,
I compared the Verbal Review Book by reading first couple of SC questions and they seems to be repeat from the OG10th edition.
Since, I have completed studying only 150 SC questions from OG10th .. So I went ahead and bought these 3 books.
These are the official books with real retired GMAT questions, with nice explanation. I feel they are definately worth buying if you have time to study and go through them.