Lol well yes it always tends to be that way- the unit you own is the best
Honestly it’s no contest on SE- the SR15 is more detailed, more dynamic, and has a bigger stage and more power. Balanced on the Sony is really quite different and similar to SR15 but is a bit warmer and of course more powerful. Balanced on the Sony is really nice
I would still give detail- air- treble to the ST15 even on SE though. The Sony has a wonderful low end.
SE on the Sony is warmer also. I haven’t tried the balanced on the ak yet- I will soonish.
I’d recommend the Sony for battery life and Bluetooth- Bass and richness. And Norma (love that moniker) for a feature rich compact dap with more detail/crunch and a bit more neutrality.
Of course it’s always subjective and depends on source and headphones.
Ak Norma SR15 is one of the most enjoyable listens I’ve ever had. Along with ZX300 balanced. I like detail and don’t like too much warmth, but I find something like Fiio x7, ibasso DX 150, too sterile/neutral for my liking. Even Cayin n5ii was a bit too dry for me.