Olympus SP-590 UZ has a
12.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor . On the other hand, Leica V-Lux 2 has a
14.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CMOS sensor .
Below you can see the SP-590 UZ and V-Lux 2 sensor size comparison.
Sensor Size and Resolution Comparison image of Olympus SP-590 UZ and Leica V-Lux 2 Cameras
Olympus SP-590 UZ and Leica V-Lux 2 have the same sensor sizes so they will provide same level of control over the depth of field when used with same focal length and aperture. On the other hand, since Olympus SP-590 UZ has 18% larger pixel area compared to Leica V-Lux 2, it has potential to collect more light on pixel level hence have less noise in low light / High ISO images.
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-590 UZ
or the
Leica V-Lux 2 ,
including hyperfocal distance.