Ttartisan 17mm f 1 4 vs voigtl nder color skopar 18mm f 2 8 aspherical?

Here is what the site says about that.

From Voigtländer Color-Skopar 18mm f/2.8 Aspherical: Voigtländer Color-Skopar 18mm f/2.8 Aspherical: A prime lens by Voigtländer for APS-C cameras, 18mm f/2.8. Specs - Maker: Voigtländer - Focal length: 18mm (prime) - Maximum aperture: f/2.8 - Made for: APS-C sensors - Mounts: Fujifilm X - Stabilised: no - Autofocus: no, manual focus What it frames like - On APS-C (Fujifilm X): like 27mm on full frame; f/2.8 gives about the depth of field of f/4.2 there. Cameras it fits - Fujifilm X-E1: ...

From TTArtisan 17mm f/1.4: TTArtisan 17mm f/1.4: A prime lens by TTArtisan for APS-C cameras, 17mm f/1.4. Specs - Maker: TTArtisan - Focal length: 17mm (prime) - Maximum aperture: f/1.4 - Made for: APS-C sensors - Mounts: Sony E, Fujifilm X, Nikon Z, L-Mount, Micro Four Thirds - Stabilised: no - Autofocus: no, manual focus What it frames like - On APS-C (Sony E, Fujifilm X, Nikon Z, L-Mount): like 26mm on full frame; f/1.4 gives about ...

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