Panasonic S3 has a
14.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor and features Venus Engine IV processor. On the other hand, Samsung WB750 has a
13.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized BSI-CMOS sensor .
Below you can see the S3 and WB750 sensor size comparison.
Sensor Size and Resolution Comparison image of Panasonic S3 and Samsung WB750 Cameras
Panasonic S3 and Samsung WB750 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 S3
or the
Samsung WB750 ,
including hyperfocal distance.