I have owned a Supernait and an AX-7e. I found the Ayre to be fairly detailed, but uninvolving. The Naim is much more revealing of musical nuance and also more full bodied. It also reveals more instrument tone. To me, the Naim is a much better amp. Of course, it is more expensive, and should be.
I have also owned two Naim XS's, and while I did enjoy them very much, the Supernait is a better in every way. I would say the XS is closer to the Ayre, although the XS is also more "musical" than the AX-7e.
I have also owned two Naim XS's, and while I did enjoy them very much, the Supernait is a better in every way. I would say the XS is closer to the Ayre, although the XS is also more "musical" than the AX-7e.