Hi Caroline, I totally agree with you, the cover of the bible and the first few pages are worn at the corners but most of the inner pages are and would be pretty much pristine. That is as you say what happens with a well used soft backed book.
The two bibles are the same edition and would therefore have the same psalms etc on the same pages. A different edition would not have the same psalms on the corresponding page numbers or a King James's bible and a New English Translation woud be totally different in style and language imo.