Canon SX30 IS has a
14.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor and features Digic 4 processor. On the other hand, Leica V-Lux 3 has a
12.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CMOS sensor .
Below you can see the SX30 IS and V-Lux 3 sensor size comparison.
Canon SX30 IS and Leica V-Lux 3 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.