Phonak introduces Marvel platform and Audéo M hearing aids

So I emailed my audi and told him I wanted to try vented domes. I think that would help with the music streaming, and sometimes I like to mute the aids at work, but with these open domes muting doesn’t do much. Also, @Neville suggested I shouldn’t be in open domes anyway.
The receptionist called me and said she had a stock of Phonak domes, so this would be no problem. I pointed out to her that Phonak had a different series of domes specific to the Marvel. She said that she didn’t see any reason why the Marvel would need a specific dome, and that even if the Phonak domes didn’t work out they have a broad selection of other domes to try out. She said they would order the Marvel domes if need be, but she didn’t think it would be necessary.
So my question is, why did Phonak even come out with a new set of domes? Is there something special about these new Marvel domes?