From M4 to px7s2e

Px7 s2e to M4. M4 has noticeably (slight) more lower end rumble, however it's a little boomy which overshadows mids and high a little in comparison. Vocal is more distant. Separation not as good as px7. Highs is about same ( it is a quick ab). Distinctively different sound signature. Both are nice don’t get me wrong ! It’s Iike coke vs Pepsi lol 😂

Position of the earcup on your ear is crucial too. On px7s2e If I move it forward a bit, everything opens up sounded clearer better in all frequencies. When I move the headphone towards back of my ears. Sound becomes muffed, sounded like boomy no details. This is somewhat similar on m4 too. (Distant from the speaker ) Hope this helps.

Result: l'm leaning towards px7 s2e.

all using Bluetooth aac. Tried usb c mode both are just miles better than aac. Tried apt adaptive, heaps better too. Now just need to upgrade my iPhone to 17 this year to use the apt adaptive dongle on the move.