I own Bose QC35II, and they definitely have a button to switch between paired devices. They do the switch automatically based on whether the sound is playing on your devices, but if both devices are playing audio at the same time you need to switch them manually by pushing the switch to Bluetooth position once (if you push and hold it goes into pairing mode, but pushing and releasing it quickly does the toggle).
You can turn on multipoint and switch sources in the app, but it's clumsy. AFAIK, there's no way to do it on the device itself (and that's disappointing). I loathe having to disconnect one source to connect another.
