Mar 29, 2015 - 11:40 AM
The covered areas do overlap. You'll have to look at the details and see how that lines up with your plans. For example, the Bernese Oberland Pass covers the train to Lucerne, but not much else: the train to Engelberg and the cable car to Titlis are discounted by 50%, but Pilatus, Rigi, the lake boats, etc. are not included at all. The Tell-Pass on the other hand does include the trains to Interlaken and Meiringen, plus one cable car from Meiringen and one cogwheel train from Brienz, but that's it: the boats from Interlaken and Thun are not included, nor is transportation into the Jungfrau region or buses up the Grimsel and Susten Pass.
One these passes may fit your plans, but you first need to have a detailed list of all the day trips you plan to make. Then follow these instructions to find out which pass is the best choice.
Hopefully this helps you out!