Ricoh G900 has a
20.0MP (1/2. ) sized BSI-CMOS sensor . On the other hand, Samsung Galaxy Camera 4G has a
16.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized BSI-CMOS sensor and features 1.4GHz Quad-Core processor.
Below you can see the G900 and Galaxy Camera 4G sensor size comparison.
As seen above, Samsung Galaxy Camera 4G has a infx Larger sensor area than Ricoh G900. 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.