It's just a different receptor. Everything else is the same when the camera is in your hands, especially as you say you have always used manual controls. Heck, with the x-700 the exposure can be almost as automatic as any digital, except it doesn't have the different modes.
“You seek escape from pain. We seek the achievement of happiness. You exist for the sake of avoiding punishment. We exist for the sake of earning rewards. Threats will not make us function; fear is not our incentive. It is not death that we wish to avoid, but life that we wish to live.” - John Galt