 
 Hi Hudson. Usually the paperback has the same story text & chapter breaks as the hardcover. What often changes is the layout. A trade paperback tends to be close to hardcover readability and while a small mass market paperback often uses tighter spacing and smaller type. If the paperback says revised edition or movie tie in & you might see bonus material like an author note and but the core chapters should match. Here is how you can check before committing. Match the hardcover and paperback by series title and publisher imprint, then compare the ISBNs and publication year to make sure they are the same edition. Open the Look Inside or sample on retailer sites for both, line up the table of contents and the first lines of a couple of chapters, and confirm they match. Compare page counts as a rough signal of type size, a much higher page count in the paperback usually means larger type or looser spacing. If you can get to a library or bookstore, place a ruler or even a credit card beside a sample page and snap a photo to gauge the x height of the letters, trade paperbacks often read like 10 to 11 point while mass market can feel like 8 to 9. Also check line spacing and paper opacity in photos to see if there is show through. If you already own the hardcover, pick a distinctive sentence at a chapter start and find it in the paperback preview to confirm the text flow is identical. 📚
Your approach is spot on and should tell you if the paperback matches the hardcover in text and chapter breaks :) One caveat is that different territories or later printings can use a fresh typeset even under the same edition label and which can change pagination and type size a little. A handy check is to count words per line in the preview since around nine to twelve per line usually reads comfortably while much above that starts to feel cramped. You actually can also peek at the trim size in the details because a smaller trim often forces tighter type and spacing.
 
  
  
 