Sony S2000 has a
10.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor and features Bionz processor. On the other hand, Nikon S8100 has a
12.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized BSI-CMOS sensor and features Expeed C2 processor.
Below you can see the S2000 and S8100 sensor size comparison.
Sensor Size and Resolution Comparison image of Sony S2000 and Nikon S8100 Cameras
Sony S2000 and Nikon S8100 have the same sensor sizes so they will provide same level of control over the depth of field when used with same focal length and aperture. On the other hand, since Sony S2000 has 33% larger pixel area compared to Nikon S8100, it has potential to collect more light on pixel level hence have less noise in low light / High ISO images.
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
Sony S2000
or the
Nikon S8100 ,
including hyperfocal distance.