I'm just listening to the BIA Atmos mix in Amazon Music with a new pair of JBL headphones and wow...
You can spot the real difference in songs like Your Latest Trick, where I'm listening stuff I never noticed before, Why Worry is also out of this world, but the start of Ride Across the River is amazing, all the percussion noises are quite separated as indepent objects and, despite I'm listening to it on stereo headphones is as there are sounds I never ever heard before, also the songs are a little longer with longer fade outs than before.
All the percussion sounds during One World are amazing, never heard them! Lot of great things here and there.
The synths at the start of BIA are wow, almost Floydian.
I also would say Guy mixed some sounds in a higher volumen than in the original mix so stuff that was buried originally now can be heard. That, or the objects technology in atmos makes everything more present in the mix even with headphones.
This mix is really something, I will get an Echo Studio speaker probably this week to try this atmos mixes properly and will tell you, but just with the headphones is something worth to listen!