Take a look at this video.
Not sure there’s necessarily anything as a direct comparison, but if you search for “prizmo vs pdfpenpro” in your search engine of choice, you’ll find various top 10 app comparisons and some comparison of specific features within particular app reviews.
In terms of PDF Pen Pro recently adding OCR automation features, they have had the option to automate OCR built in there for many years - I can’t remember how long I’ve been using it and Hazel to automate OCR (and other PDF stuff), but easily 5 or 6 years. What Smile did add in v10 this last year, was an in-app batch OCR capability to make things easier.
A familiar sounding voice may have recorded a video about it…
Hope that helps.
Perhaps that’s what I remember reading. When I typically OCR, I have many PDFs to do, and need a simple iteration mechanism.