Panasonic FH10 has a
16.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor . On the other hand, Panasonic FH1 has a
12.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor .
Below you can see the FH10 and FH1 sensor size comparison.
Panasonic FH10 and Panasonic FH1 have the same sensor sizes so they will provide same level of control over the depth of field when used with same focal length and aperture. On the other hand, since Panasonic FH1 has 32% larger pixel area (2.31µm2 vs 1.74µm2) compared to Panasonic FH10, it has larger pixel area to collect light hence potential to have less noise in low light / High ISO images.