Ttartisan 21mm f 1 5 asph vs voigtl nder nokton 21mm f 1 4 aspherical?

Here is what the site says about that.

From Voigtländer Nokton 21mm f/1.4 Aspherical: Voigtländer Nokton 21mm f/1.4 Aspherical: A prime lens by Voigtländer for Full frame cameras, 21mm f/1.4. Specs - Maker: Voigtländer - Focal length: 21mm (prime) - Maximum aperture: f/1.4 - Made for: Full frame sensors - Mounts: Sony E, Leica M - Stabilised: no - Autofocus: no, manual focus What it frames like - On full frame (Sony E, Leica M): as marked, 21mm. - On APS-C (Sony E): like 32mm on full frame; f/1.4 ...

From TTArtisan 21mm f/1.5 ASPH: TTArtisan 21mm f/1.5 ASPH: A prime lens by TTArtisan for Full frame cameras, 21mm f/1.5. Specs - Maker: TTArtisan - Focal length: 21mm (prime) - Maximum aperture: f/1.5 - Made for: Full frame sensors - Mounts: Sony E, Nikon Z, Canon RF, Leica M - Stabilised: no - Autofocus: no, manual focus What it frames like - On full frame (Sony E, Nikon Z, Canon RF, Leica M): as marked, 21mm. - On APS-C ...

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