Jumping in here. 120 Acros II has been my go to film lately since I was able to get a bunch on discount. Much of that has to do with its reciprocity characteristics as I shoot a lot around dusk and dawn. Since many of these scenes can be very high in contrast where artificial lighting in present, or when the sun starts peaking over the horizon, I like to use R09 at 1:100 dilution for 18 minutes at 20C. Agitating for 15 seconds every minute for the first 3 minutes then reducing agitation to 15 seconds for every 3 minutes (see massive dev chart Rodinal 1:100 times for Acros).
I find this combination helps reduce highlight density somewhat without yielding a extremely flat scene like stand development. I think the agitation at the beginning helps develop the shadows better, though I don't know for sure.
R09 with Acros II does yield some visible grain at close viewing distances once you get over 5x enlargement sizes, but it is certainly small. I've also tried Across II with HC-110 (new formula) dilution B. I understand that Legacy L110 is comparable to HC-110. This combination is practically gainless in comparison to my eyes. Even looking at the negatives with a 10x loop, the grain is hardly there. That being said, you won't notice the difference in grain until close viewing at larger sizes in my opinion. I can't really comment much on comparing the "tonality" between the two due to lack of experience and standardized tests. I have been sticking with R09 for now for low cost, sharper grain, and because the new formula of HC-110 seems to develop crystals in the bottle (still works however). I intend to try Adox fx-39 II with Acros once I use up more of my Rodinal.
Please take the above grain of salt as this is purely subjection and my comparisons to other combinations are limited to non-existent.
This may mostly be a metering issue with the scenes I have been shooting lately, but I have noticed thin shadows with Acros II and R09. I think Rodinal/R09 is likely part of the issue with providing reduced speed, so keep that in mind. You may need slightly more exposure than you think if you get thin negatives/shadows.
