Twins often have uncanny similarities — Harper and Cole Randolph, for example, share exceptional musical talent. They picked up instruments during kindergarten, and their paths diverged only slightly: cellist Cole studied math, music performance, and economics at the University of Wisconsin before joining the Detroit Symphony Orchestra, while violist Harper earned her music degree from the University of Michigan and was awarded third place at the 25th Annual Sphinx Competition, Senior Division. The Randolph twins will share something else at Festival Napa Valley — the performance stage for this Bouchaine Young Artist concert.