"OCP Exam Passing Scores
Oracle routinely publishes new versions of Oracle Certification exams, and the passing score across versions may differ. The passing score for each exam is set independently to maintain a consistent standard across versions. For example, to maintain a consistent standard for success, a new version of an exam which contains harder questions than the prior version will be assigned a somewhat lower required passing score. For this reason, passing scores may vary between different exams in your certification track, and between later and earlier versions of the same exam."
That means, that 57% for(1Z0-864) for the exam and 53% for (1Z0-868) for the upgrade had much more difficult questions comparing to the 1Z1-807. I don't understand that. To me, 1Z1-807 was far more difficult: ambiguous questions, antipattern questions (those antipatterns are only mentioned in Bruce Tate and some other books, they don't have the standard name on my opinion ). It's not consequent, how Oracle calculated the passing score.
But, of course, it's only my opinion, people who passed, would probably say, that it was ok