Olympus 7010 has a
12.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor and features TruePic III processor. 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 7010 and 7030 sensor size comparison.
Olympus 7010 and Olympus 7030 have the same sensor sizes so they will provide same level of control over the depth of field when used with same focal length and aperture.