Olympus 8010 has a
13.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor and features TruePic III processor. On the other hand, Olympus TG-310 has a
14.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor and features TruePic III+ processor.
Below you can see the 8010 and TG-310 sensor size comparison.
Sensor Size and Resolution Comparison image of Olympus 8010 and Olympus TG-310 Cameras
Olympus 8010 and Olympus TG-310 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 8010
or the
Olympus TG-310 ,
including hyperfocal distance.