How different are Manhattan 2007(3rd edition) from 4th edition books. Particularly, I am interested in finding out about following books:
Number Properties GMAT Preparation Guide, 4th Edition
Equations, Inequalities, and VIC's, GMAT Preparation Guide, 4th Edition
Word Translations GMAT Preparation Guide, 4th Edition
Sentence Correction GMAT Preparation Guide, 4th Edition
I have above book's 2007(3rd) edition. Shall I buy the new edition as I believe they have introduced some advanced stuff for these books? I feel comfortable in Quant (47 - 49 level). Will I be missing some important tips if I don't buy these ones?
Shall I spend that money elsewhere e.g. GMATClub tests
or Jeff Sackmann Quant stuff?
Please advise as I have few weeks left for the exam.