Nikon S6100 has a 16.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor and features Expeed C2 processor. On the other hand, Kodak C135 has a 14.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor .
Below you can see the S6100 and C135 sensor size comparison.
Sensor Size and Resolution Comparison image of Nikon S6100 and Kodak C135 Cameras
Nikon S6100 and Kodak C135 have 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 Kodak C135 has 15% larger pixel area (2.04µm2 vs 1.76µm2) compared to Nikon S6100, it has larger pixel area to collect light hence potential to have less noise in low light / High ISO images.