Sony S2100 has a
12.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor and features Bionz processor. On the other hand, Fujifilm S8600 has a
16.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor .
Below you can see the S2100 and S8600 sensor size comparison.
Sensor Size and Resolution Comparison image of Sony S2100 and Fujifilm S8600 Cameras
Sony S2100 and Fujifilm S8600 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 S2100 has 32% larger pixel area compared to Fujifilm S8600, 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 S2100
or the
Fujifilm S8600 ,
including hyperfocal distance.