As a first-time user of the Eurail pass, I've already reserved seats through the official Bernina Express website (https://shop.rhb.ch/). I've paid 36 CHF for seat reservations by selecting the 'Eurail pass' reduction option. Interestingly, the website didn't prompt me for my Eurail pass number or any related details; it simply applied the discount
Now I believe I already made the seat reservation (selected seat which I want). However, I'm uncertain whether I should also book seats through the Eurail pass website, as it seems to cost an additional 120 EUR. Could you please advise me on whether booking seats through the Eurail pass website is necessary or recommended?