Headset compatibility with each other

Hello friends, I’ve read a lot of useful things about headsets. I’m now looking for a headset. There’s no way to get past it, a Bluetooth headset will be it. I chose the Sena SMH10R as a scale. It works with Bluetooth 4.1 I had the Sena in mind because I already have a few friends of mine. Now I wanted to know, in order to get in touch with them, I have to have the same model, or the technology works so that all Bluetooth 4.1 devices are compatible with each other? Who here can also connect to “foreign” devices? Does that work at all? Interesting to hear from SMH10R owners who have also connected to other devices (if possible) Thank you for your information.http://www.sena.com/product/10r/