Sony S2000 has a
10.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor and features Bionz processor. On the other hand, 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.
Below you can see the S2000 and SX30 IS sensor size comparison.
Sony S2000 and Canon SX30 IS 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 Sony S2000 has 55% larger pixel area compared to Canon SX30 IS, it has potential to collect more light on pixel level hence have less noise in low light / High ISO images.