Leica V-Lux 2 has a
14.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CMOS sensor . On the other hand, Leica V-Lux 20 has a
12.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor .
Below you can see the V-Lux 2 and V-Lux 20 sensor size comparison.
Sensor Size and Resolution Comparison image of Leica V-Lux 2 and Leica V-Lux 20 Cameras
Leica V-Lux 2 and Leica V-Lux 20 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 Leica V-Lux 20 has 16% larger pixel area (2.31µm 2 vs 1.98µm 2 ) compared to Leica V-Lux 2, it has larger pixel area to collect light hence potential to 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
Leica V-Lux 2
or the
Leica V-Lux 20 ,
including hyperfocal distance.