Canon ELPH 130 has a
16.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized BSI-CMOS sensor and features DIGIC 4 processor. On the other hand, Casio EX-Z550 has a
14.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor .
Below you can see the ELPH 130 and EX-Z550 sensor size comparison.
Canon ELPH 130 and Casio EX-Z550 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 Casio EX-Z550 has 14% larger pixel area (2.01µm2 vs 1.76µm2) compared to Canon ELPH 130, it has larger pixel area to collect light hence potential to have less noise in low light / High ISO images.