Nikon AW100 has a
16.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CMOS sensor . On the other hand, Nikon S32 has a
13.0MP 1/3-inch (4.8 x 3.6 mm ) sized CCD sensor .
Below you can see the AW100 and S32 sensor size comparison.
As seen above, Nikon AW100 has a 1.6x Larger sensor area than Nikon S32. 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.