Audioengine Bluetooth vrs. Bluesound node 2

Good point source quality of internet stations varies widely so be sure to compare apples/apples.

Good wifi based streaming gear streaming CD res or higher should compare and perhaps even surpass CD depending. Bluesound has very good reputation and I would not expect that to bottleneck sound quality possible especially if external high quality DAC of your liking used. Not saying Bluesound dac is good or bad, I expect it is pretty good but have not heard and compared.

The book is still out for me regarding Bluetooth but I am encouraged. It works well in many cases but not sure it can match wifi quality yet or not  (have not compared technical specs carefully), though it has certainly improved in recent years on paper. So far I have been happy with Bluetooth when I use it (higher quality newer bluetooth speakers and car audio) but have not done any meaningful critical comparison yet on a more resolving system or with external DAC of my choice.

I agree the DAC used can make a huge difference in either case. Much like phono carts do with records.