Panasonic FX48 has a 12.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor . On the other hand, Olympus 7030 has a 14.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor and features TruePic III processor.
Below you can see the FX48 and 7030 sensor size comparison.
Sensor Size and Resolution Comparison image of Panasonic FX48 and Olympus 7030 Cameras
Panasonic FX48 and Olympus 7030 have sensor sizes so they will provide same level of control over the depth of field when used with same focal length and aperture.