Fujifilm Z33WP has a
10.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor . On the other hand, Ricoh WG-4 GPS has a
16.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized BSI-CMOS sensor .
Ricoh WG-4 GPS's sensor provides 6MP more than Fujifilm Z33WP's sensor, which gives a significant advantage in real life. You can print your images larger or crop more freely.
On the other hand, please keep in mind that Max sensor resolution is not the only determinant of resolving power. Factors such as the optical elements, low pass filter, pixel size and sensor technology also affects the final resolution of the captured image.
Below you can see the Z33WP and WG-4 GPS sensor size comparison.
Fujifilm Z33WP and Ricoh WG-4 GPS 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 Fujifilm Z33WP has 59% larger pixel area compared to Ricoh WG-4 GPS, it has potential to collect more light on pixel level hence have less noise in low light / High ISO images.