I want to know about how these headphones cope with working with both devices.
There are basically two possibilities:

There are basically two possibilities:
- The LG HBS700 headphones way - When listening to something on my iPad, if I want to switch to my iPhone to listen to audio there, I have to (1) turn off the headphones, (2) turn off Bluetooth on my iPad, (3) turn the headphones back on, (4) go to the Bluetooth settings on my iPhone and connect them there.
- The far better Plantronics Backbeat Go 2 headphones way - They can be 'moved' without having to turn the headphones off and on, and without having to disable Bluetooth on the iPad: you simply have to go to the second device and 'grab' them from the Bluetooth settings.