How Do Dolby TrueHD and Dolby Atmos Differ?

Q I recently bought an Xbox One X console and have it connected to my Yamaha RX-A2050 AV receiver. When I watch Atmos demo videos using the Dolby Access app on the Xbox, my AVR’s front-panel LED display reads “Dolby Atmos.” I get the same result when I watch Netflix shows with an Atmos soundtrack.

Source: How Do Dolby TrueHD and Dolby Atmos Differ? | Sound & Vision