Jan Hi 👋🏼 Jan,
First of all, welcome to the Premium club 😉🌈👌
Within Premium you can choose between 3 cards 💳... if you need all three cards all depends on your needs. Some people find it more handy to have several physical cards assigned to different accounts instead of reassigning a single card 💳.
In my case I have a Maestro and a Travel Card. The Maestro is really needed to survive here in the Netherlands :)... The Travel Card is just to have a Mastercard in my wallet. For online purchases I almost always use one of my virtual cards. Makes it also more easy to budget reacurring payments.
Mastercard or Travel Card 💳? I personally would ignore the fact that you can order a Mastercard and always go for the Travel Card 💳. It is basically the same card 💳, but with a far beter acceptance rate.
So, that are my thoughts... hope this help you out.
Have a great weekend 👌