Casio EX-FC150 has a
10.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized BSI-CMOS sensor . On the other hand, Olympus 9000 has a
12.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor .
Below you can see the EX-FC150 and 9000 sensor size comparison.
Sensor Size and Resolution Comparison image of Casio EX-FC150 and Olympus 9000 Cameras
Casio EX-FC150 and Olympus 9000 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-FC150
or the
Olympus 9000 ,
including hyperfocal distance.