Michael as you know from previous posts I can only go by actual experience. Many people claim Rodinal causes grainier negatives, I can show negatives that refute that with superb fine grain, but then I can also show a film with excessive grain from a film batch I had no problems with processed with my equipment and chemistry by someone else.
Originally Posted by Michael R 1974
Some of the highest quality 35mm prints I've seen were processed in Rodinal, but then the photographer had worked (& assisted) a master of control - Minor White.
Agfa's APX100 processed in Rodinal was probably the best film/developer combination after APX25 was dropped but Rodinal and Tmax100 was comparable although Tmax 100's true speed is EI50 a stop slower.
The bottom line is good tight processing technique leadds to very much higher quality negatives.