Yamaha has some current violin models that are clones of original Stradivarius and Guarneri del Gesu models. At a recent public event to show off these violins (I am not entirely sure, but I believe that the YVN200S was what they played) and compare them to a real Stradivarius, I met some of the Yamaha staff who developed the Stradivarius clone. They stated that acoustically it and the real Stradivarius measure pretty much identically (I believe that the measurement bandwidth was 20Hz~20kHz). However, they also said that the sound of their clone is distinguishable from the real Stradivarius, and they admitted that, at least to them, the clone sounds inferior. I got the overall impression that most of the audience present shared this opinion.