Location of mobile device

What is the difference between:

Test location: “Dulles VA USA (Desktop, Android, iOS)”
Browser: “Moto G4 - Chrome”

and

Test location: “Moto G (gen 4)”
Browser: “Moto G4 - Chrome”

something changes in the test?

They are the same. I just broke out the Android and iOS devices into top-level groups to make them easier to select but both map to the same underlying devices.