Panasonic FH25 has a
16.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor and features Venus Engine VI processor. On the other hand, Canon SX10 IS has a
10.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor .
Panasonic FH25's sensor provides 6MP more than Canon SX10 IS's sensor, which gives a significant advantage in real life. You can print your images larger or crop more freely.
On the other hand, please keep in mind that Max sensor resolution is not the only determinant of resolving power. Factors such as the optical elements, low pass filter, pixel size and sensor technology also affects the final resolution of the captured image.
Below you can see the FH25 and SX10 IS sensor size comparison.
Sensor Size and Resolution Comparison image of Panasonic FH25 and Canon SX10 IS Cameras
Panasonic FH25 and Canon SX10 IS 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.
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
Panasonic FH25
or the
Canon SX10 IS ,
including hyperfocal distance.