Sony e 18 50mm f 4 5 6 vs sony e 18 55mm f 3 5 5 6 oss?

Here is what the site says about that.

From Sony E 18-55mm f/3.5-5.6 OSS: Sony E 18-55mm f/3.5-5.6 OSS: A zoom lens by Sony for APS-C cameras, 18-55mm f/3.5-5.6. The kit zoom of the early NEX bodies. Specs - Maker: Sony - Focal length: 18-55mm (zoom) - Maximum aperture: f/3.5-5.6 (it gets darker as you zoom in) - Made for: APS-C sensors - Mounts: Sony E - Stabilised: yes - Autofocus: yes What it frames like - On APS-C (Sony E): like 27-82mm on full frame; f/3.5-5.6 gives about ...

From Sony E 18-50mm f/4-5.6: Sony E 18-50mm f/4-5.6: A zoom lens by Sony for APS-C cameras, 18-50mm f/4-5.6. Specs - Maker: Sony - Focal length: 18-50mm (zoom) - Maximum aperture: f/4-5.6 (it gets darker as you zoom in) - Made for: APS-C sensors - Mounts: Sony E - Stabilised: no - Autofocus: yes What it frames like - On APS-C (Sony E): like 27-75mm on full frame; f/4-5.6 gives about the depth of field of f/6-8.4 there. - ...

Quoted from this site's pages.