7artisans af 18mm f 2 vs sigma 28mm f 1 4 dg hsm art?

Here is what the site says about that.

From Sigma 28mm f/1.4 DG HSM Art: Sigma 28mm f/1.4 DG HSM Art: A prime lens by Sigma for Full frame cameras, 28mm f/1.4. Specs - Maker: Sigma - Focal length: 28mm (prime) - Maximum aperture: f/1.4 - Made for: Full frame sensors - Mounts: Canon EF, Nikon F, Sony E, L-Mount - Stabilised: no - Autofocus: yes What it frames like - On full frame (Canon EF, Nikon F, Sony E, L-Mount): as marked, 28mm. - On APS-C (Nikon F, Sony E, ...

From 7Artisans AF 18mm f/2: 7Artisans AF 18mm f/2: A prime lens by 7Artisans for APS-C cameras, 18mm f/2. Specs - Maker: 7Artisans - Focal length: 18mm (prime) - Maximum aperture: f/2 - Made for: APS-C sensors - Mounts: Sony E - Stabilised: no - Autofocus: yes What it frames like - On APS-C (Sony E): like 27mm on full frame; f/2 gives about the depth of field of f/3 there. - On the larger-sensor bodies of Sony E: ...

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