Casio EX-Z16 has a
12.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor and features Exilim Engine 5.0 processor. On the other hand, Ricoh GXR S10 24-72mm has a
10.0MP 1/1.7-inch (7.44 x 5.58 mm ) sized CCD sensor and features Smooth Imaging Engine IV processor.
Below you can see the EX-Z16 and GXR S10 24-72mm F2.5-4.4 VC sensor size comparison.
As seen above, Ricoh GXR S10 24-72mm has a 1.5x Larger sensor area than Casio EX-Z16. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in same focal length and aperture.