Elizabeth Rowe has been the face of the orchestra in marketing campaigns, and she and the only other woman who’s a principal in the orchestra were featured soloists in a tour of Japan. Yet “pay disparities can be significant. Ms. Rowe, 44, is paid about $70,000 less each year than John Ferrillo, 62, the principal oboist, based on data in the lawsuit and tax records. That is despite the fact that they play next to each other and are both ‘leaders of the orchestra in similarly demanding artistic roles,’ according to the lawsuit.”