Both Fujifilm S2 Pro and Konica Minolta 7D have APS-C sized 6.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the S2 Pro and 7D sensor size comparison.
Sensor Size and Resolution Comparison image of Fujifilm S2 Pro and Konica Minolta 7D Cameras
Fujifilm S2 Pro and Konica Minolta 7D have almost the same sensor size, so neither of them has any significant advantage over the other in terms of providing control over depth of field when used with the same focal length and aperture.
Sensor size sets the circle of confusion, so it drives how much depth of field each
of these bodies gives you at a given aperture. You can calculate it exactly for the
Fujifilm S2 Pro
or the
Konica Minolta 7D ,
including hyperfocal distance.