Olympus SP-610UZ has a
14.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor and features TruePic III processor. On the other hand, Olympus SP-600 UZ has a
12.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor and features TruePic III processor.
Below you can see the SP-610UZ and SP-600 UZ sensor size comparison.
Sensor Size and Resolution Comparison image of Olympus SP-610UZ and Olympus SP-600 UZ Cameras
Olympus SP-610UZ and Olympus SP-600 UZ 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 SP-610UZ
or the
Olympus SP-600 UZ ,
including hyperfocal distance.