Ummm, the Marvel series was introduced in 2018, so compared to the current Paradise series they are “older tech”.
Phonak improved the Music issue with the Paradise, although many members of this forum are very pleased with music on the Marvels.
It really comes down to your audi’s ability to tune them.
Sorry about the link, and thanks to @WhiteHat for finding the current one.
Good for you, I’ve suggested the foamy fix to a few members here. Another plus is you can mute the mics, and further enhance the sound, as well as make them “Noise Cancelling” earbuds!
Not sure if Costco sells the Phonak Active Vent for the KS 10, but I’ve heard positive feedback on the system.