Canon SX150 IS has a 14.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor and features Digic 4 processor. On the other hand, Olympus TG-6 has a 12.0MP (1/2. ) sized BSI-CMOS sensor and features TruePic VIII processor.
Below you can see the SX150 IS and TG-6 sensor size comparison.
As seen above, Canon SX150 IS has a 0.0x Larger sensor area than Olympus TG-6. 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.