Kodak Astro Zoom AZ651 has a 21.0MP 1/2.3" (6.17 x 4.55 mm ) sized CMOS sensor . On the other hand, Canon M3 has a 24.0MP APS-C (22.3 x 14.9 mm ) sized CMOS sensor and features DIGIC 6 processor.
Below you can see the Astro Zoom AZ651 and M3 sensor size comparison.
As seen above, Canon M3 has a 11.8x Larger sensor area than Kodak Astro Zoom AZ651. 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.