Sony fe 20mm f 1 8 g vs sigma 20mm f 2 dg contemporary?

Here is what the site says about that.

From Sony FE 20mm f/1.8 G: Sony FE 20mm f/1.8 G: A prime lens by Sony for Full frame cameras, 20mm f/1.8. Specs - Maker: Sony - Focal length: 20mm (prime) - Maximum aperture: f/1.8 - Made for: Full frame sensors - Mounts: Sony E - Stabilised: no - Autofocus: yes What it frames like - On full frame (Sony E): as marked, 20mm. - On APS-C (Sony E): like 30mm on full frame; f/1.8 gives about the depth of field ...

From Sigma 20mm f/2 DG Contemporary: Sigma 20mm f/2 DG Contemporary: A prime lens by Sigma for Full frame cameras, 20mm f/2. A small metal ultra-wide from the I series; sold as the 20mm f/2 DG DN Contemporary before 2025. Specs - Maker: Sigma - Focal length: 20mm (prime) - Maximum aperture: f/2 - Made for: Full frame sensors - Mounts: Sony E, L-Mount - Stabilised: no - Autofocus: yes What it frames like - On full frame (Sony E, L-Mount): ...

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