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, FujiFilm AV250 has a
16.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor .
Below you can see the SX30 IS and AV250 sensor size comparison.
Canon SX30 IS and FujiFilm AV250 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 Canon SX30 IS has 13% larger pixel area compared to FujiFilm AV250, it has potential to collect more light on pixel level hence have less noise in low light / High ISO images.