I'm afraid I can't do a meaningful comparison S0lar, as I don't have any of the mentioned phones at hand.
Soundstage is now fixed through good tip matching, and signature now significantly warmer / sweeter. Even more impressed now, and am genuinely surprised that a little single armature can cover the spectrum so well. Quite an eye (or ear) opener!
Bass, I feel, is better qualitatively than any other BA universal I've owned, barring perhaps that of the SM3. The body and texturing on offer here really is pleasing, and whilst it lacks the rumble I'm used to, it punches very well. It's tight enough to maintain great speed whilst not making big sacrifices in weight, a balance I felt the DBA and B2 failed to achieve (relative to my preference). EDM is presented fantastically on these, as is rock / metal.
Mids slap me with a sweetness that shotgunshane aptly describes as "slightly aggressive". Riff crunch is good and leads wail with real conviction. In typical sweet fashion vocals are brought to the forefront, but never over power. Detailing is very good and the slight upper mid emphasis gives very good clarity, despite the boosted bass. The mids appear to present a near perfect balance in that they are neither liquid nor dry, whilst still coming across as both accurate and musical.
Treble roles off a little earlier than I'm used to, but retains just enough extension to convincingly present those all so important transients. I wouldn't call it smooth but detect no grain, as some people have, and certainly no sibilance. Sparkle is minimal, though with a signature like this, I really don't miss it. Indeed, it's understated nature helps to make the overall signature so pleasingly non-fatiguing.
Soundstage is the only thing that fails to impress, though do I recognize that of late I've been spoiled with immersive presentations. The width feels average, whilst the depth does feel a little lacking, flattening the overall space a bit. Excellent imaging negates this somewhat as does great separation. At no point does the A161p present as congested or confined.
Overall I'd say I'm impressed. Very impressed. Thank you Shotgunshane, Tinyman392, Flysweep and Inks for influencing this excellent buy!