Casio EX-FH100 has a
10.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized BSI-CMOS sensor . On the other hand, Samsung HZ25W has a
12.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor .
Below you can see the EX-FH100 and HZ25W sensor size comparison.
Sensor Size and Resolution Comparison image of Casio EX-FH100 and Samsung HZ25W Cameras
Casio EX-FH100 and Samsung HZ25W 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
Casio EX-FH100
or the
Samsung HZ25W ,
including hyperfocal distance.