Both Samsung CL80 and Canon SX30 IS have 1/2.3-inch sized 14.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the CL80 and SX30 IS sensor size comparison.
Samsung CL80 and Canon SX30 IS 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. On the other hand, since Canon SX30 IS has 1% larger pixel area (2.01µm2 vs 1.99µm2) compared to Samsung CL80, it has larger pixel area to collect light hence potential to have less noise in low light / High ISO images.