Both Fujifilm X70 and Panasonic TS6 have 16.0 MP resolution sensors but Fujifilm X70's sensor is APS-C (23.6 x 15.6 mm ) and Panasonic TS6's sensor is 1/2.33' (6.08 x 4.56 mm ).
Since Fujifilm X70's has a larger sensor area with the same resolution, this means that it also has a larger pixel area hence better light collecting capacity for a given aperture compared to Panasonic TS6.
Below you can see the X70 and TS6 sensor size comparison.
As seen above, Fujifilm X70 has a 13.3x Larger sensor area than Panasonic TS6. 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.