There are two ways to travel between Munich and Innsbruck by train. The first way is the heavily traveled Eurocity route which follows the Inn to Kufstein, then crosses the rolling farmlands past Rosenheim and approaches Munich from the east. The other way winds over the mountains and gorges to Mittenwald and Garmisch-Partenkirchen, and then approaches Munich from the southwest.(https://klavierzimmer.wordpress.com)
Because the second (or third?) place I call home is now the “Five Lakes Region” in southern Bavaria, I’ve been riding the Mittenwald regional line more often. It’s a longer, creakier ride but it’s less crowded, more scenic and —surprise — considerably cheaper.
Whether this is because the route has some extra subsidy, or because the other way involves some additional tariff, I can’t say. But I use the extra hour to read, catch up on learning music, and generally just chill out and enjoy the view.