Panasonic FZ1000 has a
20.0MP 1″ (13.2 x 8.8 mm ) sized CMOS sensor and features Venus Engine processor. On the other hand, Samsung HZ30W has a
12.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor .
Panasonic FZ1000's sensor provides 8MP more than Samsung HZ30W'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 FZ1000 and HZ30W sensor size comparison.
As seen above, Panasonic FZ1000 has a 4.1x Larger sensor area than Samsung HZ30W. 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.