Xtol, in any dilution, seems to offer more real emulsion speed than Rodinal in any dilution, as well as a finer perceived grain.(posted 9487 days ago)I normally use Xtol 1+1 for 35mm and Xtol 1+3 for 120, these choices are primarily result of the capacity of the small tanks I use for processing. I believe the 1+3 dilution increases grain *very slightly*. My tests with Rodinal used the 1+50 dilution.
Frankly, I didn't perceive any difference in real sharpness between T-Max in Rodinal or Xtol, though the T-Max processed in Rodinal was certainly grainier. I've read complaints that Xtol destroys the accutance of TMX, but my experience differs.
In Xtol, I expose TMX @ EI 100, TMY @ EI 400. In Rodinal, I expose TMX @ EI 64, TMY @ EI 320.
Dana K6JQ Dana@Source.Net