Panasonic FZ80 has a 18.0MP 1/2.3 (6.17 x 4.55 mm ) sized BSI-CMOS sensor and features Venus Engine processor. On the other hand, Olympus 7000 has a 12.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor .
Panasonic FZ80's sensor provides 6MP more than Olympus 7000'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 FZ80 and 7000 sensor size comparison.
Panasonic FZ80 and Olympus 7000 have almost the same sensor size so none of them has any significant advantage over other in providing control over depth of field when used with same focal length and aperture.