Greg,(posted 9134 days ago)I have not used the films you mentioned, but I have developed 400 speed films (Agfa and Delta 400) in Xtol and am amazed at the results. I dilute it to 1+3 and get very fine grain. I dont see any advantage to using it in a less dilute form.
I will be interested to know the results of your faster films in Xtol.