I have Manhattan Prep's Sentence Correction 5th Edition guide. I am debating if I should get SC's 6th edition or not. Can someone please advice if I should get the newer edition ? What are the differences between the 2 editions ?
they are quite different, but this folder isn't the right place for your query.
your best option would be to contact our student services department, at 212-721-7400 or gmat@manhattanprep.com. the student services reps will be able to tell you all about the new guides.