Casio EX-Z450 has a
12.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor . On the other hand, Canon SX60 HS has a
16.0MP 1/2.3 (6.17 x 4.55 mm ) sized BSI-CMOS sensor and features DIGIC 6 processor.
Below you can see the EX-Z450 and SX60 HS sensor size comparison.
Casio EX-Z450 and Canon SX60 HS 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-Z450 has 18% larger pixel area compared to Canon SX60 HS, it has potential to collect more light on pixel level hence have less noise in low light / High ISO images.