Is the book business: a changing world 7th edition identical to the 6th edition? best answer for most helpful?

Iam a college student and bought the 7th edition for 130 dollars but someones selling a 6th edition for 45 dollars, it would be nice to save a little money. Help me out.|||It will probably be 98% the same. Sometimes I think they come out with new additions to make more money. But it%26#039;s rare things will end up on different pages. It also depends how quickly the subject matter changes. You could ask your professor if it%26#039;s OK to get the 6th edition. In my classes, the professors seemed aware sometimes kids would have a previous edition. One time I recall him telling kids who had an older edition to go to a different page, but usually it doesn%26#039;t matter. Shouldn%26#039;t it say somewhere in the beginning or the back of the book what changes were made?