Both Panasonic ZS35 and Olympus SP-620 UZ have 1/2.3-inch sized 16.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the ZS35 and SP-620 UZ sensor size comparison.
Sensor Size and Resolution Comparison image of Panasonic ZS35 and Olympus SP-620 UZ Cameras
Panasonic ZS35 and Olympus SP-620 UZ 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 ZS35
or the
Olympus SP-620 UZ ,
including hyperfocal distance.
