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