Fujifilm X30 has a 12.0MP 2/3" (8.8 x 6.6 mm ) sized CMOS sensor and features EXR Processor II processor. On the other hand, Pentax WG-3 has a 16.0MP 1/2.3" (6.17 x 4.55 mm ) sized BSI-CMOS sensor .
Below you can see the X30 and WG-3 sensor size comparison.
As seen above, Fujifilm X30 has a 2.1x Larger sensor area than Pentax WG-3. 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.