Thanks, Henry.
I stored a few images which I corrected with various Topaz tools (Denoise/Sharpen) and start to compare them with the PAI - current version.
When I was first exposed to Topaz (not that long ago), Denoise and Sharpening were my aces and, in a few instances, they produced excellent results. At least a betterment compared to the originals.
This is an original 1984 JPEG:

The edit changed the white balance more than I was hoping for.
This is the correction using prior versions of denoise:

Mostly Denoise and some Sharpening
Now, Using PAI:

PAI - default setting
In this instance, the P in PAI did a better job than my M in manual.
The combination of denoise, face masking and whatever 'recipe' PAI uses may produce better (and faster) results than using the tools individually. I used PAI with its default settings. The original denoise make the result way too harsh (over sharpened?) and with some odd colors, especially in the faces.
I am not in a position to compare with other similar tools, but I sense that Topaz is going in the right direction.
These were my in-laws in 1984, attending the 400th Anniversary of Quebec City Foundation. My father in-law was a river pilot and he was really in his element here, as one can see his smile and joy.
Unfortunately, they have both passed away.
--
Jerome Boyer