Samsung ST150F has a
16.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor . On the other hand, Samsung PL120 has a
14.0MP 1/2.3-inch (6.16 x 4.62 mm ) sized CCD sensor .
Below you can see the ST150F and PL120 sensor size comparison.
Sensor Size and Resolution Comparison image of Samsung ST150F and Samsung PL120 Cameras
Samsung ST150F and Samsung PL120 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
Samsung ST150F
or the
Samsung PL120 ,
including hyperfocal distance.