First things first, define deficiencies.
It’s been my experience interior PDCs do show more “deficiencies”. But that’s expected when photos are taken behind washers/dryers, selfie sticks are used to take photos of every part of the roof including behind fireplaces, etc. I'm not saying all interior PDCs cover that much ground, but I have seen many photograph minor items that exist in all homes. When I asked one company about it I was told they are trained to take photos of EVERYTHING and let the appraiser decide. Problem is, when an appraiser decides a drywall screw pop behind the washer is minor they want statements about safety, soundness, marketability, cost to cure, etc.