The only lens in your list that I've used is the Schneider 120mm f/5.6 Apo Digitar M Lens. I used it for images in the 1:2 to 2:1 range and it was superb for that use.
I tested it at lower magnification for tabletop work and my experience was perhaps similar to yours in your testing of the APO 120mm L compared to the Makro-Symmar 120mm HM. I found that the macro lens tended to lose sharpness fairly quickly as I moved further from the range it was designed for which is 1:4 to 4:1 (optimized at 1:1). I got better results with a standard lens until I was approaching the 1:4 magnification range. If you are flexible regarding the focal length, there are a number of excellent non-macro lenses in the 100mm to 135mm range.
I didn't use it over a long period of time or do extensive testing or comparison. This was also several years ago. So, your experience may vary from mine. I'll be curious as to what you find.
My general impression is that the APO 120mm L lens, that you have is a fine lens for "close-up" work until you get down into those higher magnification ratios. I would expect the newer generations of lenses of similar design would be better; it's a question of how much better. The Schneider 120mm ASPH does have the reputation of being the best of the best in its category.
It may be helpful, in getting useful feedback from others, to know how much magnification you need for the close-up usage you intend. If it's helpful to you, here's a link to specs for the discontinued Schneider Digitar lenses.
https://www.arca-swiss-magasin.com/contents/fr/digitare_e.pdfAnd a description from Schneider of the APO 120mm L lens that you have...
https://www.walkercameras.com/lenses/s_wide_56120.html