Olympus E-M1X has a 20.0MP Four Thirds (17.4 x 13 mm ) sized CMOS sensor and features Dual TruePic VIII processor. On the other hand, Samsung TL320 has a 12.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor .
Olympus E-M1X's sensor provides 8MP more than Samsung TL320'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 E-M1X and TL320 sensor size comparison.
As seen above, Olympus E-M1X has a 8.2x Larger sensor area than Samsung TL320. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in same focal length and aperture.