There is no difference in content, the content is the same. First of all, it doesn't matter whether you read e-books or paper books. It is important that you have a good habit of reading. The advantage of e-books is that they are easy to carry and read anytime and anywhere. Paper books have a sense of texture and ink waves when reading. How many pages you read, it is easy to evaluate the thickness and produce a sense of accomplishment. Moreover, the unread part can be easily found and read. This is according to your own preferences, so there is no difference in content between the paper book and the downloaded e-book of the same book, but it gives people a different feeling.