Dear Madam/Sir
As you can read on the "What to expect" section there is a description at number 4:
"Ospizio Bernina
Getting off the Bernina train for a quick stop on the highest point of the ride! IN THE WINTER we get off at Diavolezza stop!"
The reason we get off there it is because the best of the ride, very spectacular with amazing view, is between Tirano that is 400 meters above the sea level and the top at over 2.000 meters. After that the train descends only for 400 meters to reach S. Moritz on the same car road route but taking longer. Driving by bus 20 minutes (instead of double by train) we have the same view and save some time to stay longer in S. Moritz.
In Varenna, on Lake Como, instead we normally have about 30 minutes however it depends on the train from Milan that sometimes has delay and so, in order to follow our schedule, in some cases we need to do it a bit quicker.
Having the Bernina train departure time already set, a quick stop along the way to break the long ride and wanting to give our clients at least 1 hour for lunch time we do not have too much flexibility to change the program of the day.
Thanks
Luca Martinelli