What is the difference between the violin and the viola?
See: http://beststudentviolins.com/StringCareSpecs.html#4 Note that the viola is “not just a big violin.” Violists will have you assassinated if you even think that. Playing the viola requires a very different touch, different fingerings, different position work, different vibrato, and an entirely different mindset with respect to its role in the orchestral and chamber music repertoire. Violists are very sensitive about this.