Mixvibes Audio Interfaces

I was surprised to learn that the U46mk2 is listed as discontinued by several online vendors, and I notice that the U-Mix44 is the only available option in the webshop here...
Am I correct in assuming that the U46mk2 is a better quality soundcard compared to the U-Mix44? If so, why is it discontinued and has another interface been announced to replace it?
Am I correct in assuming that the U46mk2 is a better quality soundcard compared to the U-Mix44? If so, why is it discontinued and has another interface been announced to replace it?