I had a thought that as I was using Flacplayer app to play my music that my result might be skewed for some reason.
So headphone out using the Apple stock music player.
*Music loaded is standard Apple size.
ACDC - Thunderstruck.
5G. Vocals forward, a bit overwhelming.
6G. Bold, forward, clear, effortless.
Current 93 - all the pretty horses.
5G. Nice, a little dark, vocals too forward.
6G. Smooth, nice micro detail, clear.
Donna Summer - Last...