Voigtl nder nokton 35mm f 1 2 aspherical iv vs voigtl nder nokton vintage line 35mm f 1 5 aspherical?

Here is what the site says about that.

From Voigtländer Nokton Vintage Line 35mm f/1.5 Aspherical: Voigtländer Nokton Vintage Line 35mm f/1.5 Aspherical: A prime lens by Voigtländer for Full frame cameras, 35mm f/1.5. Specs - Maker: Voigtländer - Focal length: 35mm (prime) - Maximum aperture: f/1.5 - 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, 35mm. Cameras it fits - Leica M9: Full frame - Leica M9-P: Full frame - [Leica ...

From Voigtländer Nokton 35mm f/1.2 Aspherical IV: Voigtländer Nokton 35mm f/1.2 Aspherical IV: A prime lens by Voigtländer for Full frame cameras, 35mm f/1.2. Specs - Maker: Voigtländer - Focal length: 35mm (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, 35mm. Cameras it fits - Leica M9: Full frame - Leica M9-P: Full frame - [Leica ...

Quoted from this site's pages.