Sony WX220 has a
18.0MP 1/2.3' (6.17 x 4.55 mm ) sized BSI-CMOS sensor and features Bionz X processor. On the other hand, Samsung TL210 has a
12.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor .
Sony WX220's sensor provides 6MP more than Samsung TL210's sensor, which gives a significant advantage in real life. You can print your images larger or crop more freely.
On the other hand, please keep in mind that Max sensor resolution is not the only determinant of resolving power. Factors such as the optical elements, low pass filter, pixel size and sensor technology also affects the final resolution of the captured image.
Below you can see the WX220 and TL210 sensor size comparison.
Sony WX220 and Samsung TL210 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.