Canon SX10 IS has a
10.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor . On the other hand, Olympus 1 has a
12.0MP 1/1.7-inch (7.44 x 5.58 mm ) sized BSI-CMOS sensor and features TruePic VI processor.
Below you can see the SX10 IS and 1 sensor size comparison.
As seen above, Olympus 1 has a 1.5x Larger sensor area than Canon SX10 IS. 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.