Samsung HZ25W has a
12.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor . On the other hand, Samsung HZ10W has a
10.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor .
Below you can see the HZ25W and HZ10W sensor size comparison.
Sensor Size and Resolution Comparison image of Samsung HZ25W and Samsung HZ10W Cameras
Samsung HZ25W and Samsung HZ10W 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 Samsung HZ10W has 35% larger pixel area (3.13µm 2 vs 2.31µm 2 ) compared to Samsung HZ25W, it has larger pixel area to collect light hence potential to have less noise in low light / High ISO images.
Sensor size sets the circle of confusion, so it drives how much depth of field each
of these bodies gives you at a given aperture. You can calculate it exactly for the
Samsung HZ25W
or the
Samsung HZ10W ,
including hyperfocal distance.