Sony W350 has a
14.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor and features Bionz processor. On the other hand, Sony WX300 has a
18.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized BSI-CMOS sensor .
Below you can see the W350 and WX300 sensor size comparison.
Sensor Size and Resolution Comparison image of Sony W350 and Sony WX300 Cameras
Sony W350 and Sony WX300 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 Sony W350 has 28% larger pixel area compared to Sony WX300, it has potential to collect more light on pixel level hence 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
Sony W350
or the
Sony WX300 ,
including hyperfocal distance.