For me the answer is quite clear: they simply work. Apple like. Did I test all the others you mentioned? No. Probably because I used to have several Bluetooth headset. They hardly ever worked. For me, I had to have high trust in the HW company to ever test a Bluetooth headset again.
Did you realize you had to press the circular button on the back of the charging case. It's hard to see and they won't pair with anything unless you do.
