Nikon A10 has a
16.0MP 1/2.3' (6.17 x 4.55 mm ) sized CCD sensor . On the other hand, Panasonic FP2 has a
14.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor and features Venus Engine IV processor.
Below you can see the A10 and FP2 sensor size comparison.
Nikon A10 and Panasonic FP2 have almost the same sensor size, so neither of them has any significant advantage over the other in terms of providing control over depth of field when used with the same focal length and aperture.