Microphen is a speed increasing developer, so good for pushing film to actually obtain a higher true speed. You'll get about 1/2-2/3 stop more speed with Microphen.
Replenished Xtol loses about 1/3 of a stop, full strength Xtol gives full speed (as does ID-11).
Replenished Xtol loses about 1/3 of a stop, full strength Xtol gives full speed (as does ID-11).
