That was the issue with the Ayre for me...too clean/clinical for my ears and just missing the heart of the music. In context it was being used in an all Ayre system (V5xe, K5xeMP, QB9, SF Cremona). I also tried both Pure Music, Amarra and Decibel...Amarra seemed to sound the best but can't recall the version number.
The Metrum in contrast is much more musical without losing the details. I may be more tuned to a warmer sound in general though. In context the Metrum is being used as part of a Shindo Cortese, Masseto, DeVore 9's system.
Not really an apples to apples comparison but just sharing my experience.