Tmax 100 is more responsive to development time changes, so you have to be more careful to be consistant. I've developed Delta and Tmax (mainly 120 size)in Xtol and I find the Tmax 100 grain finer. Also, I do alot of copying of line drawings. It's easy to reduce exposure a little and increase exposure time and get crisp, contrasty negs for this kind of work. Delta is a good film but I give Tmax the edge.(posted 9172 days ago)