Mar 13, 2013 - 8:52 AM
Hello nilesh2013, welcome to MySwissAlps!
My personal preference would be to do both the mountains, because I would choose to see as much of the Alps as possible in the limited number of days. The falls are great too, but you'd be moving away from the mountains. Of course you do need clear weather to go up in the mountains, so your could base your choice on the weather forecast the evening before. A visit to the Rhine falls can be done with less perfect weather as well.