Sigma 17mm f 4 dg contemporary vs samyang af 18mm f 2 8 fe?

Here is what the site says about that.

From Samyang AF 18mm f/2.8 FE: Samyang AF 18mm f/2.8 FE: A prime lens by Samyang for Full frame cameras, 18mm f/2.8. Specs - Maker: Samyang - Focal length: 18mm (prime) - Maximum aperture: f/2.8 - Made for: Full frame sensors - Mounts: Sony E - Stabilised: no - Autofocus: yes What it frames like - On full frame (Sony E): as marked, 18mm. - On APS-C (Sony E): like 27mm on full frame; f/2.8 gives about the depth of field ...

From Sigma 17mm f/4 DG Contemporary: Sigma 17mm f/4 DG Contemporary: A prime lens by Sigma for Full frame cameras, 17mm f/4. A tiny metal ultra-wide from the I series; sold as the 17mm f/4 DG DN before 2025. Specs - Maker: Sigma - Focal length: 17mm (prime) - Maximum aperture: f/4 - 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): as ...

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