You asked

Laowa 11mm f 4 5 ff rl vs ttartisan 11mm f 2 8 fisheye?

Here is what the site says about that.

From Laowa 11mm f/4.5 FF RL: Laowa 11mm f/4.5 FF RL: A prime lens by Laowa for Full frame cameras, 11mm f/4.5. Specs - Maker: Laowa - Focal length: 11mm (prime) - Maximum aperture: f/4.5 - 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, 11mm. - ...

From TTArtisan 11mm f/2.8 Fisheye: TTArtisan 11mm f/2.8 Fisheye: A prime lens by TTArtisan for Full frame cameras, 11mm f/2.8. Specs - Maker: TTArtisan - Focal length: 11mm (prime) - Maximum aperture: f/2.8 - Made for: Full frame sensors - Mounts: Sony E, Nikon Z, Canon RF, L-Mount, Leica M, Canon EF, Nikon F - Stabilised: no - Autofocus: no, manual focus What it frames like - On full frame (Sony E, Nikon Z, Canon RF, L-Mount, Leica M, ...

Quoted from this site's pages.

From these pages