We will be traveling to Switzerland in mid-late June. We plan to travel by train from Milan to Tirano, and then switch trains to Swizz rail to travel from Tirano to St. Moritz. We plan to use regular trains instead of the Bernina Express.
Do we need to make reservations for the regular trains?
Are there any significant negatives to using regular trains for this journey? We understand that the regular trains won't have panoramic windows and will stop in more places.
Thanks!