Panasonic LX3 has a
10.0MP 1/1.63-inch (8.07 x 5.56 mm ) sized CCD sensor . On the other hand, 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.
Below you can see the LX3 and SP-610UZ sensor size comparison.
As seen above, Panasonic LX3 has a 1.6x Larger sensor area than Olympus SP-610UZ. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in same focal length and aperture.