I've not used all the combinations of film and developers you mention above, but I think you will agree that each emulsion/developer combination has subtle but different final print characteristics. PMKPyro, when used with a stain receptive emulsion, can produce a print with a unique characteristic. The caveat is, not all emulsions stain equally, in fact some don’t stain at all, or the same emulsion can stain differently between 120 and sheet film.(posted 8647 days ago)PMKPyro takes some getting used to, lots of experimentation (for me), and lots of patience and reading and careful thought. Personally, I really like it for my large format fine art landscape work … and I also use it on my Holga 120 negs – but more out of convenience.
BTW: PMKPyro A and B parts hold my dark room record for stability. I was off photography for about 1 ½ years. When I reopened it, I had these two crusty part A and B dark amber half full bottles of PMKPyro that were 2 years old to the month. I mixed them and processed film and got the same great results as the day I originally mixed it. But I wouldn’t try this on a regular basis, that is don’t take that much time off from photography :-) But it means you can mix a big batch of develper and use it for months without fear of it losing it effectness.