Fujifilm X70 has a
16.0MP APS-C (23.6 x 15.6 mm ) sized CMOS X-TRANS II sensor and features EXR Processor II processor. On the other hand, Olympus 6000 has a
10.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor .
Fujifilm X70's sensor provides 6MP more than Olympus 6000'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 X70 and 6000 sensor size comparison.
As seen above, Fujifilm X70 has a 13.1x Larger sensor area than Olympus 6000. 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.