I did an A B comparison of MQA vs the Ultra HD track of Bob Marley "Is This Love" in 24/96. I used the Bluesound Node as a streamer. If there was a difference it was so subtle that I would have to split hairs to find it. Quboz sounded bright in my rig in comparison.
The streamer you use to playback Ultra HD tracks needs to be hirez capable. The firestick and the xbox one only play 44 khz and not higher. If you are going to use this service make sure you have a device that is hirez capable. A PC works fine via usb, just make sure to go into sound settings and in the advanced area set it for 24/192 output.