I can't think what is different then @Richard_R
But as you say, you can do everything that you want, so it is no problem. Just odd that two XTs behave in different ways.
Two music questions
Re: Two music questions
I have had that with both my Sena headsets. You need to go into the XT to the wifi/bluetooth settings and make sure the "Media Audio" box is ticked for your headset. By default neither of my Senas were but once I ticked the box for each they both work fine.
I find that the Google home mini lady has a much better sense of humour than Siri on my phone.