If there is a quick way to characterize the difference between Glycin and Amido, itl is that Amidol is about blacks and Glycin is about highlights. This doesn't mean Glycin can't make dazzling blacks or Amidol, never ending whites.
The context is that any significance depends upon a technique built to exploit the differences. For one looking to make a good looking print, use Dektol. If you have a particular vision and are willing to fight for it, explore Amidol and Glycin.
This is all predicated on a mastery of technique unified with clarity of vision. It is EXACTLY like arguing the virtues of tonewoods in fine guitars. To appreciate the differences, first become a superb guitarist, then pick the wood that, in the hands of a sympathetic luthier, will help you get where you are capable of going, regardless.
The problem, however,is that RC is pretty darn limited. As Ole say, it is consistent.
Ansco 130 is my standard developer for fiber, and since 95% of my work is fiber, when I do RC, I use 130. Works wonderfully well. But if I did 95% of my work on RC, I'd use Ilford and I'd use -- oh, gosh --- BW 65. I use TF4 from Formulary, and might as well order their developer at the same time.
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