I wonder what the difference in price between a 4-consecutive Swiss Saverpass and the Half-Fare Card is when you take into account the round trip train fare from Zurich to say Wengen - covered 100% by the pass and of course 50% by the Half-Fare card.

And then in the BOB there are many trains and lake boats that accept the pass at 100% rather than 50%?

I thinking it may be about the same?