You asked

Leica noctilux m 75mm f 1 25 asph vs voigtl nder nokton 75mm f 1 5 aspherical?

Here is what the site says about that.

From Leica Noctilux-M 75mm f/1.25 ASPH: Leica Noctilux-M 75mm f/1.25 ASPH: A prime lens by Leica for Full frame cameras, 75mm f/1.2. Specs - Maker: Leica - Focal length: 75mm (prime) - Maximum aperture: f/1.2 - Made for: Full frame sensors - Mounts: Leica M - Stabilised: no - Autofocus: no, manual focus What it frames like - On full frame (Leica M): as marked, 75mm. Cameras it fits - Leica M9: Full frame - Leica M9-P: Full frame - [Leica ...

From Voigtländer Nokton 75mm f/1.5 Aspherical: Voigtländer Nokton 75mm f/1.5 Aspherical: A prime lens by Voigtländer for Full frame cameras, 75mm f/1.5. Sold for Leica M as the Vintage Line version. Specs - Maker: Voigtländer - Focal length: 75mm (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 ...

Quoted from this site's pages.

From these pages