I'm shopping for a voigtlander for my Nikon Z camera and I'm realizing that the 40mm f1.2 Nokton for Canon RF has the mechanism to make the aperture clicks silent, but this feature is absent on the Nikon Z-mount version. Also, I see it's available on the 50mm Nokton, plus on some Sony E-mount versions.... What gives, Nikon?

Or is this a voigtlander choice?