Fujifilm SL300 has a
14.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor . On the other hand, Sony H200 has a
20.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor .
Sony H200's sensor provides 6MP more than Fujifilm SL300'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 SL300 and H200 sensor size comparison.
Fujifilm SL300 and Sony H200 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 Fujifilm SL300 has 10% larger pixel area compared to Sony H200, it has potential to collect more light on pixel level hence have less noise in low light / High ISO images.