A general concern that a friend and I have if we ever get together and fly our DJIs together. Our plan is to power up one and see if the other person's controller when active interferes before powering up the other and check in a similar manner. Then carefully launch and see with the finger on the emergency motor cut and hope that function is not interfered with if something goes wonky.
But thinking maybe not with the Neo based on owning two. After activating Neo #2 I thought that the Google3 would automatically select the Neo that was powered up. Wrong. Needed to relink Neo #1. There was no option to "switch" like you do with different DJI models in the menu. Have watch sections of Neo YTube videos of Neo following another Neo. But most seemed to be one Neo in autonomous selfie mode followed by the controlled Neo.