sure I have heard both and while I chose to own an Ayre VX-R in both the initial and then Twenty ( Diamond ) design, I think you might be missing the point a BIT...compared to many other components in the chain, amps are VERY low in distortion...OF course both Nelson and Charlie gifted genius designers with KEEN ears. I did own many Threshold products and think highly of his current work. I think listening to the product in a system with similar design principles and objectives might be more illuminating than a point comparison. For example the effects of negative feedback on a temporally accurate transducer....or not...
have fun, enjoy the music...
Jim
have fun, enjoy the music...
Jim