I owned an Aurieges L for about a year before I upgraded to the Masseto. I auditioned both the Monbrisson and the Masseto before choosing the Masseto. The Monbrisson was significantly better (to my ears) than the Aurieges, and the Masseto was significantly better (to my ears) than the Monbrisson. Quantifying audible differences in performance between gear is not something I am comfortable with, probably due to the fact that I am a Physicist, and for me, numbers need to be verifiable. That said, I am comfortable in stating my opinion that I perceived an audible difference in linestage performance for the above comparisons of greater than 10 percent. Whether or not such differences in performance are worth the considerable increases in cost is another matter entirely. For me, it was worth it!