I have never used Tidal, so I can't comment on its SQ with an Apple TV. I wirelessly stream my lossless ripped CDs from my iMac or my wife's MacBook Pro to either an Apple TV or an Airport Express and use the optical out into a DAC. In my experience the SQ using the Apple TV or Airport Express is identical to the Node 2.
My son purchased a Node 2 a while back and he found no difference between it and his Apple TV using his external DAC. He let me try it before returning it and my results were the same as his. I have 4 systems, 2 with an Airport Express and 2 with an Apple TV. I tried the Node 2 with all four of my systems and heard no difference using my DACs. I tried the Node 2 with its internal DAC, but I preferred the SQ with my DACs.
My son purchased a Node 2 a while back and he found no difference between it and his Apple TV using his external DAC. He let me try it before returning it and my results were the same as his. I have 4 systems, 2 with an Airport Express and 2 with an Apple TV. I tried the Node 2 with all four of my systems and heard no difference using my DACs. I tried the Node 2 with its internal DAC, but I preferred the SQ with my DACs.