Samyang af 14mm f 2 8 vs viltrox af 14mm f 4 air?

Here is what the site says about that.

From Samyang AF 14mm f/2.8: Samyang AF 14mm f/2.8: A prime lens by Samyang for Full frame cameras, 14mm f/2.8. A full-frame autofocus ultra-wide; the RF version was short-lived. Specs - Maker: Samyang - Focal length: 14mm (prime) - Maximum aperture: f/2.8 - Made for: Full frame sensors - Mounts: Sony E, Canon RF - Stabilised: no - Autofocus: yes What it frames like - On full frame (Sony E, Canon RF): as marked, 14mm. - On APS-C (Sony ...

From Viltrox AF 14mm f/4 Air: Viltrox AF 14mm f/4 Air: A prime lens by Viltrox for Full frame cameras, 14mm f/4. A very small full-frame ultra-wide. Specs - Maker: Viltrox - Focal length: 14mm (prime) - Maximum aperture: f/4 - Made for: Full frame sensors - Mounts: Sony E, Nikon Z, L-Mount - Stabilised: no - Autofocus: yes What it frames like - On full frame (Sony E, Nikon Z, L-Mount): as marked, 14mm. - On APS-C (Sony E, Nikon ...

Quoted from this site's pages.