Samsung Galaxy Camera 3G 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. On the other hand, Pentax MX-1 has a
12.0MP 1/1.7-inch (7.44 x 5.58 mm ) sized CMOS sensor .
Below you can see the Galaxy Camera 3G and MX-1 sensor size comparison.
As seen above, Pentax MX-1 has a 1.5x Larger sensor area than Samsung Galaxy Camera 3G. 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.