Canon rf 50mm f 1 2l usm vs ttartisan 50mm f 1 4 asph?

Here is what the site says about that.

From Canon RF 50mm f/1.2L USM: Canon RF 50mm f/1.2L USM: A prime lens by Canon for Full frame cameras, 50mm f/1.2. Specs - Maker: Canon - Focal length: 50mm (prime) - Maximum aperture: f/1.2 - Made for: Full frame sensors - Mounts: Canon RF - Stabilised: no - Autofocus: yes What it frames like - On full frame (Canon RF): as marked, 50mm. - On APS-C (Canon) (Canon RF): like 80mm on full frame; f/1.2 gives about the depth of ...

From TTArtisan 50mm f/1.4 ASPH: TTArtisan 50mm f/1.4 ASPH: A prime lens by TTArtisan for Full frame cameras, 50mm f/1.4. Specs - Maker: TTArtisan - Focal length: 50mm (prime) - Maximum aperture: f/1.4 - Made for: Full frame sensors - Mounts: Sony E, Nikon Z, Canon RF, L-Mount, Leica M - Stabilised: no - Autofocus: no, manual focus What it frames like - On full frame (Sony E, Nikon Z, Canon RF, L-Mount, Leica M): as marked, 50mm. - ...

Quoted from this site's pages.