Choose paperback for reading value
Paperbacks are usually lighter, easier to carry, and better for everyday reading. They are also easier to compare across stores when the edition is clearly listed.
Choose hardcover for durability or gifting
Hardcovers can be better for gifts, collections, and books you expect to keep for years. They should be treated as separate editions in comparison results.
Watch for bundled editions
Boxed sets and collections can look cheaper per book, but they are not the same product as a single paperback. Compare them only when you actually want the full set.