Sony W380 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 WX350 has a
18.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized BSI-CMOS sensor .
Below you can see the W380 and WX350 sensor size comparison.
Sony W380 and Sony WX350 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 W380 has 28% larger pixel area compared to Sony WX350, it has potential to collect more light on pixel level hence have less noise in low light / High ISO images.