I've tried both and agree with previous answers that you should be able to obtain satisfactory results with both developers. One point that must be noted with Rodinal is to avoid overdevlopment and overexposure. Rodinal works best with the thinnest negative that will give you adequate shadow detail. You may get away with denser negatives sometimes, but not always. Afapan 400 is easier to use in this respect than 400 Delta. Both Agfa and Ilford development guidelines are way too long for my taste (I use a condenser enlarger). Most magazine reviews of films that I have read use Agfa's recommended times at 1:25 and complain about coarse, mushy grain and low sharpness, which is what I have experienced if i wasn't careful to follow my own advice. Run test rolls with bracketed exposures before developing important images. I prefer a dilution of 1:75 or 1:100 over 1:25 or 1:50. When and if you find a development and exposure combo that works the photos should give briliance and sharpness.(posted 8101 days ago)If you can find it, read "Rodinal: A Soup for All Seasons?" ca. 1980, by Bob Schwalberg in Popular Photography. It's still the best discussion I've found.