Sony e 20mm f 2 8 vs sigma 19mm f 2 8 dn art?

Here is what the site says about that.

From Sigma 19mm f/2.8 DN Art: Sigma 19mm f/2.8 DN Art: A prime lens by Sigma for APS-C cameras, 19mm f/2.8. A cheap, light wide prime from 2013, common used. Specs - Maker: Sigma - Focal length: 19mm (prime) - Maximum aperture: f/2.8 - Made for: APS-C sensors - Mounts: Sony E, Micro Four Thirds - Stabilised: no - Autofocus: yes What it frames like - On APS-C (Sony E): like 28mm on full frame; f/2.8 gives about the depth of ...

From Sony E 20mm f/2.8: Sony E 20mm f/2.8: A prime lens by Sony for APS-C cameras, 20mm f/2.8. Specs - Maker: Sony - Focal length: 20mm (prime) - Maximum aperture: f/2.8 - Made for: APS-C sensors - Mounts: Sony E - Stabilised: no - Autofocus: yes What it frames like - On APS-C (Sony E): like 30mm on full frame; f/2.8 gives about the depth of field of f/4.2 there. - On the larger-sensor bodies of Sony E: ...

Quoted from this site's pages.