As I have mentioned on other posts I have at work an old Denon PMA250 MK2 with a Harmon Kardon Bluetooth receiver for streaming Spotify from either my phone or my son's phone. I have always been of the opinion it's compressed music going over Bluetooth which is going to compress it more so you won't hear much difference between the phones boy was I wrong.
I don't but expensive phones, for a while I used an Honor 10 lite £150, my son has an Asus ROG phone 3 £500.
Boy the difference, as my son said my phone sounded so flat. His ROG just sounded so much better across the board. I now have a Motorola can't remember the model but it's a budget 5G model that I got for £170 from Argos £30 off the original £200 it has Dolby Atmos which I find stupid in a phone when it was designed for AV but it sounds significantly better than my old Honor even with the atmos turned off. Although if Atmos is on I put it in auto as the "music" preset sounds really muffled, a poorly executed preset that one. My son's ROG is still the best sounding if our phones. But any way really surprised at the sound quality difference between the phones.