I saved alot of money.

Satisfy yourself, that is what it’s about. You have a good system but the CD player is the weak link. So don’t take your test as the final answer. This is a hobby where we keep learning what works.

mahler123, to add to reubent's comment, when you connect the Auris Bluetooth via the digital output you are bypassing the Auris's internal DAC. So my Hegel's internal DAC is doing the work.
Thank you russ69 for you saying my NAD CD player is the weak link. I've had it for a couple of years. It was a huge improvement over my Technics carousel player that was under $200.00 20 years ago. I have never listened to a high end player. Since I'm only using the NAD as a transport would a much more expensive CD player give better results?
Thanks to all for your comments.

@goldern210.....No need to have to make excuses for using your cell for a 'head unit' to this immoral mortal....*G*  Been using a cell to drive the audio in 3 vehicles (Focus, Landcruiser, Dodge dually) and the 'shop' audio system with Spotify Premium.  The same service frequently drives my office system and the 'main' system.  (The latter too big to be mobile, anyway....office and main running Ryzen 5 processors...*L*)

Updated the cell to a Pixel 4A recently; haven't nosed around for any 'enhancements' as yet (usually an eq that has more bands 'cause of the varied 'environments') but will get around to it soon enough.

Understand a limited budget; although 'retired' in concept only, I've not free rein as to what I can spend on 'audio only' pursuits.  But there's no reasonable rationale to apologize for what one enjoys or the means of attaining such.  The 'digital realm' of audio is expanding daily, especially in terms of the device that's in your hand.

BTW...I do like analog, but since it gets 'run through' a primarily digital process en route to my speakers.....one begins to wonder and doubt....;)

That is the beauty of digital. It is just numbers. Does not matter where the numbers come from. Only the final clocking is important. 
I just did a similar comparison of a high res file to the same file being played over my Sonos network. Could not tell the difference.

Golden210, I think it is because you and I have crappy hearing:-)

What a great concept buy what you can afford and enjoy what you have. It’s all about the music in the end.