I've found over the years its all based on the auditor. Some hone in on certain things and others on other things. Just make sure the core stuff is handled and make sure your HACCP plan, verification and validation are sound. I had heard with edition 9 they were looking more into Food Safety Culture and I was prepared but our auditor never mentioned it or dove into it. I also find it helpful to set up a book that follows the code and has the SOPs and documents we say are in place for that section of the code in order. Helps the audit go a but smoother.
I would second this. I'm on my 4th audit with my facility and we're circling back to the auditor I had the first time. Each auditor focused on a different thing- one laid into maintenance for an entire audit. One focused on me having Spanish translations for literally every document under the sun- yes even my Hazard Analysis, because I had Spanish speaking employees, another was all about verbiage- if SQF left it as an "option" to add to a procedure, to him it was not optional but required. He lectured me about interchanging version and revision in my Document Control Program...
One year I got super unlucky and they had to send their technical writer to audit us (my first time leading an audit at that), and he was ALLL about Water. Tried to get permission to knock out walls to look for internal back flow on a 70yr old building's pipes, gave us a major for ingredient order (lost that argument somehow), and he went through all our external micro swabs checking codes to make sure they used the right one at the labs, when he made a mistake he got giddy and started singing about issuing us a point. Its almost fun to see what they come up with.
Every auditor has that one thing that makes them tick- sometimes its easy, sometimes its not. Just make sure all the new Risk Analysis they came out with for V9 you've done, and always always utilize Guidance Documents- auditors love to reference them!!!