Tokina atx m 11 18mm f 2 8 vs sigma 10 18mm f 2 8 dc dn contemporary?

Here is what the site says about that.

From Sigma 10-18mm f/2.8 DC DN Contemporary: Sigma 10-18mm f/2.8 DC DN Contemporary: A zoom lens by Sigma for APS-C cameras, 10-18mm f/2.8. Specs - Maker: Sigma - Focal length: 10-18mm (zoom) - Maximum aperture: f/2.8 - Made for: APS-C sensors - Mounts: Sony E, Fujifilm X, L-Mount, Canon RF - Stabilised: no - Autofocus: yes What it frames like - On APS-C (Sony E, Fujifilm X, L-Mount): like 15-27mm on full frame; f/2.8 gives about the depth of field of f/4.2 there. ...

From Tokina atx-m 11-18mm f/2.8: Tokina atx-m 11-18mm f/2.8: A zoom lens by Tokina for APS-C cameras, 11-18mm f/2.8. A small, bright ultra-wide zoom for APS-C. Specs - Maker: Tokina - Focal length: 11-18mm (zoom) - Maximum aperture: f/2.8 - Made for: APS-C sensors - Mounts: Sony E, Fujifilm X - Stabilised: no - Autofocus: yes What it frames like - On APS-C (Sony E, Fujifilm X): like 16-27mm on full frame; f/2.8 gives about the depth of field ...

Quoted from this site's pages.